Tapio Lokki's publications

Theses

1. Lokki, T., Physically-based Auralization -- Design, Implementation, and Evaluation
   Doctoral thesis, Helsinki University of Technology, Department of Computer Science and Engineering, Telecommunications Software and Multimedia Laboratory, Report TML-A5, 2002. [Online]
2. Lokki, T., Virtuaaliääniympäristön luominen konserttisalin laskennalliseen malliin
   Master's thesis (in Finnish), Helsinki University of Technology, Faculty of Electrical Engineering, Laboratory of Acoustics and Audio Signal Processing, 76 p., 1997. [Online], Title in english: "Implementation of Virtual Acoustics for a Computational Concert Hall Model", [Abstract in English]

International Journal Articles

1. Tervo, S., Pätynen, J., and Lokki, T., "Acoustic Reflection Localization from Room Impulse Responses," Acta Acustica united with Acustica, Accepted for publication, 2012.
2. Tervo, S., Lokki, T., and Savioja, L., "Maximum Likelihood Estimation of Loudspeaker Locations from Room Impulse Responses," Journal of the Audio Engineering Society, vol. 59, no. 11, pp. 845-857, November 2011. [Online (AES)]
3. Pätynen, J. and Lokki, T.,"Evaluation of concert hall auralization with virtual symphony orchestra," Journal of Building Acoustics, vol. 18, no. 3-4, pp. 349-366, 2011. [Online]
4. Lokki, T. and Pätynen, J.,"Lateral reflections are favorable in concert halls due to binaural loudness," Journal of the Acoustical Society of America, vol. 130, no. 5, pp. EL345-EL351, November 2011. [Online (AIP)]
5. Lokki, T., Pätynen, J., Kuusinen, A., Vertanen, H., and Tervo, S., "Concert hall acoustics assessment with individually elicited attributes," Journal of the Acoustical Society of America, vol. 130, no. 2, pp. 835-849, August 2011 [Online]
6. Lokki, T., Pätynen, J., Tervo, S., Siltanen, S., and Savioja, L., "Engaging concert hall acoustics is made up of temporal envelope preserving reflections," Journal of the Acoustical Society of America, vol. 129, no. 6, pp. EL223-EL228, June 2011. [Online (AIP) + Binaural demovideo]
7. Tervo, S., Korhonen, T., and Lokki, T., "Estimation of Reflections from Impulse Responses," Journal of Building Acoustics, vol. 18, no. 1-2, pp. 159-174, March 2011. [Online]
8. Pätynen, J., Katz, B.F.G., and Lokki, T., "Investigations on the balloon as an impulse source," Journal of the Acoustical Society of America, vol. 129, no. 1, pp. EL27-EL33, January 2011. [Online (AIP)]
9. Pätynen, J. and Lokki, T., "Directivities of symphony orchestra instruments," Acta Acustica united with Acustica, vol. 96, no. 1, pp. 138-176, January/February 2010. [Online (Ingenta)]
10. Vilkamo, J., Lokki, T., and Pulkki, V. "Directional audio coding: Virtual microphone based synthesis and subjective evaluation," Journal of the Audio Engineering Society, vol. 57, no. 9, pp. 709-724, September 2009. [Online]
11. Siltanen, S., Lokki, T., and Savioja, L. "Frequency domain acoustic radiance transfer for real-time auralization," Acta Acustica united with Acustica, vol. 95, nr. 1, pp. 106-117, January/February 2009. [Online (Ingenta)]
12. Laine, S., Siltanen, S., Lokki, T., and Savioja, L., "Accelerated beam tracing algorithm," Applied Acoustics, vol. 70, nr. 1, pp. 172-181, January 2009. [Online (ScienceDirect)]
13. Pätynen, J., Pulkki, V., and Lokki, T., "Anechoic recording system for symphony orchestra," Acta Acustica united with Acustica, vol. 94, nr. 6, pp. 856-865, November/December 2008. [Online (Ingenta)]
14. Lokki, T., Pulkki, V., and Calamia, P., "Measurement and modeling of diffraction from an edge of a thin panel," Applied Acoustics, vol. 69, nr. 9, pp. 824-832, September 2008. [Online (ScienceDirect)]
15. Siltanen, S., Lokki, T., Savioja, L., and Christensen, C.L., "Geometry reduction in room acoustics modeling," Acta Acustica united with Acustica, vol. 94, nr. 3, pp. 410-418, May/June 2008. [Online (Ingenta)]
16. Siltanen, S., Lokki, T., Kiminki, S., and Savioja, L., "The room acoustic rendering equation," Journal of the Acoustical Society of America, vol. 122, nr. 3, pp. 1624-1635, 2007. [Online (AIP)]
17. Gröhn, M., Lokki, T., and Takala, T., "Localizing sound sources in a cave-like virtual environment with loudspeaker array reproduction," Presence: Teleoperators & Virtual Environments, vol. 16, nr. 2, pp. 157-171, April 2007. [Online (MIT Press), Online (EBSCOhost)]
18. Ilmonen, T. and Lokki, T., "Extreme Filters -- Cache-Efficient Implementation of Long IIR and FIR Filters," IEEE Signal Processing Letters, vol. 13, nr. 7, pp. 401-404, July 2006. [Online (IEEE)]
19. Gröhn, M., Lokki, T., and Takala, T., "Comparison of auditory, visual, and audiovisual navigation in a 3D space," ACM Transactions on Applied Perception, vol. 2, nr. 4, pp. 564-570, October 2005. [Online (ACM)]
20. Gröhn, M., Lokki, T., and Takala, T., "Author's comments on Gröhn, Lokki, and Takala, ICAD 2003," ACM Transactions on Applied Perception, vol. 2, nr. 4, pp. 571-573, October 2005.[Online (ACM)]
21. Lokki, T. and Gröhn, M., "Navigation with auditory cues in a virtual environment," IEEE Multimedia, special issue on "Interactive Sonification", vol. 12, no. 2, pp. 80-86, April/June 2005. [Online (IEEE), complementary video examples]
22. Lokki, T., "Subjective comparison of four concert halls based on binaural impulse responses," Acoustical Science and Technology,, vol. 26, no. 2 (Special issue on Room Acoustics in honour of RADS 2004), pp. 200-203, March 2005. [Online]
23. Härmä, A., Jakka, J., Tikander, M., Karjalainen, M, Lokki, T., Hiipakka, J., and Lorho, G., "Augmented reality audio for mobile and wearable appliances," Journal of the Audio Engineering Society, vol. 52, no. 6, pp. 618-639, June 2004. [Online (AES)]
24. Pulkki, V. and Lokki, T., "Visualization of edge diffraction," Acoustics Research Letters Online (ARLO), vol. 4, no. 4, pp. 118-123, October 2003. [Online (AIP)]
25. Lokki, T., Savioja, L., Väänänen, R., Huopaniemi, J., and Takala, T. "Creating Interactive Virtual Auditory Environments," IEEE Computer Graphics and Applications, special issue "Virtual Worlds, Real Sounds", vol. 22, no. 4, pp. 49-57, July/August 2002. [Online (IEEE)]
26. Lokki, T. and Karjalainen, M. "Analysis of Room Responses, Motivated by Auditory Perception," Journal of the New Music Research, vol. 31, no. 2, pp. 163-169, 2002. [Online]
http://dx.doi.org/10.1145/2019335.2019337
27. Savioja, L., Huopaniemi, J., Lokki, T., and Väänänen, R. "Creating Interactive Virtual Acoustic Environments," Journal of the Audio Engineering Society, vol. 47, no. 9, pp. 675-705, Sept. 1999. [Online]
28. Lokki, T., Hiipakka, J., Hänninen, R., Ilmonen, T., Savioja, L., and Takala, T., "Real-time audiovisual rendering and contemporary audiovisual art," Organised Sound, vol. 3 no. 3, pp. 219-233, 1998. [Online (Cambridge)]

Book Chapters

1. Pulkki, V., Lokki, T., and Rocchesso, D., "Spatial effects," Chapter 5 in DAFX: Digital Audio Effects, Zölzer, U. (Ed.), 2nd edition, pp. 139-184, Wiley, March 2011.
2. Lokki, T. and Savioja, L., "Virtual acoustics," Chapter in Handbook of Signal Processing in Acoustics, Havelock, D., Kuwano, S., and Vorländer, M. (Eds.), Vol. 1, pp. 761-772, Springer. 2008.

International Conference Articles

1. Lokki, T., "Recording and reproducing concert hall acoustics for subjective evaluation", In International Seminar on Virtual Acoustics (ISVA), Valencia, Spain, November 24-25, 2011. [Online] Invited keynote presentation.
2. Gamper, H. Tervo, S., and Lokki, T., "Head orientation tracking using binaural headset microphones", In the AES 131st International Convention, New York, NY, USA, October 20-23, 2011. [Online (AES)]
3. Pätynen, J., Tervo, S., and Lokki, T., "Simulation of the violin section sound based on the analysis of orchestra performance," In IEEE Workshop on Applications of Signal Processing to Audio and Acoustics (WASPAA 2011), New Paltz, New York, USA, October 16-19, 2011, pp. 173-176. [Online (IEEE)] This paper won the Best Student Paper Award.
4. Lokki, T., Southern, A., Siltanen, S., and Savioja, L., "Studies of Epidaurus with a hybrid room acoustics modeling method," In The Acoustics of Ancient Theaters, Patras, Greece, September 18-21, 2011. [Online]
5. Albrecht, R., Lokki, T., and Savioja, L., "A mobile augmented reality audio system with binaural microphones," In Interacting with sound workshop (IwS'11), Stockholm, Sweden, August 30, 2011. [Online (ACM)]
6. Lokki, T., Southern, A., and Savioja, L., "Studies on seat-dip effect with 3D FDTD modeling," In Forum Acusticum, Aalborg, Denmark, June 27 - July 1, 2011, pp. 1517-1522. [Online]
7. Southern, A., Lokki, T., Savioja, L., and Murphy, D., "The perceptual effects of dispersion error on room acoustic model auralization," In Forum Acusticum, Aalborg, Denmark, June 27 - July 1, 2011, pp. 1553-1558. [Online]
8. Siltanen, S., Lokki, T., and Savioja, L., "Efficient acoustic radiance transfer method with time-dependent reflections," In ASA 161st meeting, Seattle, Washington, May 23-27, 2011. [Online] POMA Volume 12, pp. 015007.
9. Lokki, T., Pätynen, J., and Zacharov, N., "Concert hall acoustics assessment with sensory evaluation -- Tools and practices," In The Eigth International Conference On Auditorium Acoustics, Dublin, Ireland, May 20-22, 2011, pp. 35-44. [Online]
10. Pätynen, J., Tervo, S., and Lokki, T., "Investigations on the development of the frequency response along time in concert halls," In The Eight International Conference On Auditorium Acoustics, Dublin, Ireland, May 20-22, 2011, pp. 159-168. [Online]
This paper won the Arup Acoustics Bursary Award.
11. Gamper, H. and Lokki, T., "Spatialisation in Audio Augmented Reality Using Finder Snaps," in "Principles and applications of spatial hearing" book (World Scientific, ISBN-10981-4313-87-4), pp. 383-392, 2011.
12. Pulkki, V., Laitinen, M.-V., Vilkamo, J., Ahonen, J., Lokki, T., and Pihlajamäki, T. "Perception-based reproduction of spatial sound and directional audio coding," in "Principles and applications of spatial hearing" book (World Scientific, ISBN-10981-4313-87-4), pp. 324-336, 2011.
13. Pätynen, J. and Lokki, T., "Evaluation of concert hall auralization with virtual symphony orchestra," In the International Symposium on Room Acoustics (ISRA2010), Melbourne, Australia, August 29-31, 2010. [Online]
14. Siltanen, S., Lokki, T., and Savioja, L.,"Room acoustics modeling with acoustics radiance transfer," In the International Symposium on Room Acoustics (ISRA2010), Melbourne, Australia, August 29-31, 2010. [Online]
15. Siltanen, S., Lokki, T., and Savioja, L.,"Rays or Waves? Understanding the Strengths and Weaknesses of Computational Room Acoustics Modeling Techniques," In the International Symposium on Room Acoustics (ISRA2010), Melbourne, Australia, August 29-31, 2010. [Online]
16. Lokki, T., Vertanen, H., Kuusinen, A., Pätynen, J., and Tervo, S., "Auditorium Acoustics Assessment with Sensory Evaluation Methods," In the International Symposium on Room Acoustics (ISRA2010), Melbourne, Australia, August 29-31, 2010. [Online]
17. Tervo, S., Korhonen, T., and Lokki, T., "Estimation of Reflections from Impulse Responses," In the International Symposium on Room Acoustics (ISRA2010), Melbourne, Australia, August 29-31, 2010. [Online]
18. Lokki, T. and Puolamäki, K., "Canonical analysis of individual vocabulary profiling data," In Second International Workshop on Quality of Multimedia Experience (QoMEX2010), Trondheim, Norway, June 21-23, 2010, pp. 152-157. [Online (IEEE)]
19. Lokki, T., Vertanen, H., and Siltanen, S., "Intuitive hand gestures in measurement of the perceived size of an auditory image of a symphony orchestra," In AES 38th International Conference on Sound Quality Evaluation, Piteå, Sweden, June 13-15, 2010, pp. 111-120. [Online (AES)]
20. Kuusinen, A., Vertanen, H., and Lokki, T., "Assessor selection and behavior in individual vocabulary profiling of concert hall acoustics," In AES 38th International Conference on Sound Quality Evaluation, Piteå, Sweden, June 13-15, 2010, pp. 181-190. [Online (AES)]
21. Gamper, H. and Lokki, T., "Audio augmented reality in telecommunication through virtual auditory display," In 16th International Conference on Auditory Display (ICAD 2010), Washington, D.C, USA, June 9-15, 2010, pp. 63-71. [Online]
22. Kajastila, R. and Lokki, T., "Eyes-free Methods for Accessing Large Auditory Menus," In 16th International Conference on Auditory Display (ICAD 2010), Washington, D.C, USA, June 9-15, 2010, pp. 223-230. [Online]
23. Gamper, H. and Lokki, T., "Instant BRIR Acquisition for Auditory Events in Audio Augmented Reality Using Finger Snaps," In International Workshop on the Principles and Applications of Spatial Hearing (IWPASH), Miyagi Zao Royal Hotel, Japan, November 11-13, 2009. [Online]
24. Kajastila, R., Vehviläinen, J., Palm, P., and Lokki, T., "Funkypod: Integrating Auditory and Visual Menus," In International Workshop on the Principles and Applications of Spatial Hearing (IWPASH), Miyagi Zao Royal Hotel, Japan, November 11-13, 2009. [Online]
25. Pulkki, V., Laitinen, M.-V., Vilkamo, J., Ahonen, J., Lokki, T., and Pihlajamäki, T. "Directional audio coding - perception-based reproduction of spatial sound," In International Workshop on the Principles and Applications of Spatial Hearing (IWPASH), Miyagi Zao Royal Hotel, Japan, November 11-13, 2009, Invited paper. [Online]
26. Tervo, S., Pätynen, J., and Lokki, T. "Acoustic reflection path tracing using a highly directional loudspeaker," In IEEE Workshop on Applications of Signal Processing to Audio and Acoustics (WASPAA 2009), New Paltz, New York, USA, October 18-21, 2009, pp. 245-248. [Online (IEEE)]
27. Lokki, T. and Pätynen, J., "Applying anechoic recordings in auralization," In the EAA Symposium on Auralization, Espoo, Finland, June 15-17, 2009. [Online]
28. Lokki, T., Pätynen, J., Peltonen, T., and Salmensaari, O., "A Rehearsal Hall with Virtual Acoustics for Symphony Orchestras," In the AES 126th International Convention, Munich, Germany, May 7-10, 2009, paper nr. 7695. [Online (AES)]
29. Kajastila, R. and Lokki, T., "A Gesture-based and eyes-free control method for mobile devices," In CHI'09 extended abstracts on Human factors in computing systems, pp. 3559-3564, Boston, MA, USA, April 4-9, 2009. [Online (ACM)]
30. Peltola, M., Lokki, T., and Savioja, L., "Augmented reality audio for location-based games," In AES 35th International conference on Audio for Games, London, UK, February 11-13, 2009. [Online (AES)]
31. Pätynen, J., Tervo, S., and Lokki, T. "A loudspeaker orchestra for concert hall studies," In The Seventh International Conference On Auditorium Acoustics, pp. 45-52, Oslo, Norway, October 3-5, 2008. [Online]
32. Tervo, S. and Lokki, T. "Interpolation methods for the SRP-PHAT algorithm," In The 11th International Workshop on Acoustic Echo and Noise Control (IWAENC2008), Seattle, Washington, USA, September 14-17, 2008. [Online]
33. Lokki, T. and Savioja, L., "State-of-the-art in auralization of concet hall models -- What is still missing?," In Baltic-Nordic Acoustics Meeting, Reykjavik, Iceland, August 17-19, 2008. [Online]
34. Lokki, T. "Diffusiveness and intensity analysis of spatial impulse responses," In Acoustics'08, pp. 6495-6500, Paris, France, June 29-July 4, 2008. [Online]
35. Lokki, T., Pätynen, J., and Pulkki, V. "Recording of anechoic symphony music," In Acoustics'08, pp. 6431-6436, Paris, France, June 29-July 4, 2008. Invited paper. [Online]
36. Siltanen, S. and Lokki, T. "Diffraction modeling in acoustic radiance transfer method," In Acoustics'08, pp. 5625-5630, Paris, France, June 29-July 4, 2008. Invited paper. [Online]
37. Lokki, T., "How many point sources is needed to represent strings in auralization?," In the International Symposium on Room Acoustics (ISRA'2007), Paper P11, Sevilla, Spain, September 10-12, 2007. [Online]
38. Siltanen, S., Lokki, T., and Savioja, L., "Acoustic radiance transfer method for room acoustic modeling," In the 19th International Congress on Acoustics (ICA'2007), Paper RBA-05-008, Madrid, Spain, September 2-7, 2007. Invited Paper. [Online]
39. Kajastila, R., Lokki, T., and Savioja, L., "Interactive multi-channel auralization with camera-based tracking," In the 19th International Congress on Acoustics (ICA'2007), Paper RBA-15-010, Madrid, Spain, September 2-7, 2007. Invited Paper. [Online]
40. Kajastila, R., Siltanen, S., Lunden, P., Lokki, T., and Savioja, L., "A distributed real-time virtual acoustic rendering system for dynamic geometries," In the AES 122th International Convention, Vienna, Austria, May 5-8, 2007, paper nr. 7160. [Online (AES)]
41. Lokki, T., Kajastila, R., and Takala, T., "Virtual acoustic spaces with multiple reverberation enhancement systems," In Proceedings AES 30th International conference on intelligent audio environments, Saariselkä, Finland, March 15-17, 2007. [Online (AES)]
42. Ahonen, J., Pulkki, V., and Lokki, T., "Teleconference application and B-format microphone array for Directional Audio Coding," In Proceedings AES 30th International conference on intelligent audio environments, Saariselkä, Finland, March 15-17, 2007. [Online (AES)]
43. Lokki, T. and Nenonen, V., "Immersive visualization of room acoustics," In Baltic-Nordic Acoustics Meeting, Gothenburg, Sweden, November 8-10, 2006. [Online]
44. Vesa, S. and Lokki, T., "Detection of room reflections from a binaural room impulse response," In the 9th International Conference on Digital Audio Effects (DAFx'06), pp. 215-220, Montreal, Canada, September 18-20, 2006. [Online (DAFX)]
45. Siltanen, S., Lokki, T., and Savioja, L., "Geometry reduction in room acoustics modeling," In The Sixth International Conference On Auditorium Acoustics, pp. 409-416, Copenhagen, Denmark, May 5-7, 2006. [Online]
46. Lokki, T., Ilmonen, T., Mäkelä, W., and Takala, T., "Upponurkka: An inexpensive immersive display for public VR installations," In IEEE Virtual Reality 2006, Workshop on Emerging Display Technologies, pp. 15-18, Alexandria, Virginia, USA, March 26, 2006. [Online (IEEE)]
47. Vesa, S. and Lokki, T., "An Eyes-Free User Interface Controlled by Finger Snaps," In the 8th International Conference on Digital Audio Effects (DAFx'05), pp. 262-265, Madrid, Spain, September 20-22, 2005. [Online (DAFX)]
48. Lokki, T. and Savioja, L., "Evaluation of Auralization Results," In Forum Acusticum 2005, paper nr. 471-0, Budapest, Hungary, August 29 - September 2, 2005, invited paper. [Online]
49. Lokki, T., "Auralization of simulated impulse responses in slow motion," In the AES 118th International Convention, Barcelona, Spain, May 28-31, 2005, paper nr. 6500. [Online (AES), Listen to demo]
50. Takala, T., Savioja, L., and Lokki, T., "Swimming in a Virtual Aquarium," In The 6th International Workshop on Gesture in Human-Computer Interaction and Simulation, Vannes, France, May 18-20, 2005. [Online]
51. Gröhn, M., Lokki, T., and Takala, T., "An orientation experiment using auditory artificial horizon," In the 10th International Conference on Auditory Display (ICAD'2004), Sydney, Australia, July 6-9, 2004. [Online (ICAD)]
52. Pulkki, V., Merimaa, J., and Lokki, T., "Reproduction of reverberation with spatial impulse response rendering," In the AES 116th International Convention, Berlin, Germany, May 8-11, 2004, preprint nr. 6057. [Online (AES)]
53. Lokki, T., Nironen, H., Vesa, S., Savioja, L., Härmä, A., and Karjalainen M., "Application scenarios of wearable and mobile augmented reality audio," In the AES 116th International Convention, Berlin, Germany, May 8-11, 2004, preprint nr. 6026. [Online (AES)]
54. Lokki, T. and Pulkki, V., "Modeling diffraction from an edge between surfaces with different materials," In The International Symposium on Room Acoustics: Design and Science (RADS 2004), Paper #O29, Hyogo, Japan, April 11-13, 2004. [Online]
55. Lokki, T. and Pulkki, V., "Measurement and theoretical validation of diffraction from a single edge," In the 18th International Congress on Acoustics (ICA'2004), Vol. II, pp. 929-932, Kyoto, Japan, April 4-9, 2004. [Online]
56. Pulkki, V., Merimaa, J., and Lokki, T., "Multi-channel reproduction of measured room responses," In the 18th International Congress on Acoustics (ICA'2004), Vol. II, pp. 1273-1276, Kyoto, Japan, April 4-9, 2004. [Online]
57. Lokki, T., Nironen, H., Vesa, S., Savioja, L., and Härmä, A., "Problem of far-end user's voice in binaural telephony," In the 18th International Congress on Acoustics (ICA'2004), Vol. II, pp. 1001-1004, Kyoto, Japan, April 4-9, 2004. Invited Paper. [Online]
58. Pulkki, V. and Lokki, T., "Visualizing diffraction for educational purposes," In the 18th International Congress on Acoustics (ICA'2004), Vol. III, pp. 2313-2316, Kyoto, Japan, April 4-9, 2004. Invited demonstration. [Online]
59. Gröhn, M., Lokki, T., and Takala, T., "Comparison of auditory, visual, and audio-visual navigation in a 3D space," In the 9th International Conference on Auditory Display (ICAD'2003), pp. 200-203, Boston, MA, USA, July 6-9, 2003. [Online (ICAD)]
60. Pihkala, K. and Lokki, T., "Extending SMIL with 3D audio," In the 9th International Conference on Auditory Display (ICAD'2003), pp. 95-98, Boston, MA, USA, July 6-9, 2003. [Online (ICAD)]
61. Pulkki, V. and Lokki, T., "Visualizing diffraction of a loudspeaker enclosure," In Third International Conference on Modelling and Experimental Measurements in Acoustics (ACOUSTICS 2003), pp. 233-242, Cadiz, Spain, June 16-18, 2003. [Online]
62. Härmä, A., Jakka, J., Tikander, M., Karjalainen, M., Lokki, T., Nironen, H., and Vesa, S., "Techniques and applications for wearable augmented reality audio,", In the AES 114th International Convention, Amsterdam, the Netherlands, May 22-25, 2003, preprint nr. 5768. [Online (AES)]
63. Savioja, L., Lokki, T., and Huopaniemi, J., "Interactive room acoustics rendering in real time," In IEEE International Conference on Multimedia and Expo (ICME'2002), Vol. I, pp. 497-500, Lausanne, Switzerland, August 26-29, 2002. [Online (IEEE)]
64. Lokki, T. and Savioja, L., "A flexible framework for parametric auralization," In Joint Baltic-Nordic Acoustical Meeting, Lyngby, Denmark, August 25-28, 2002. (Paper published in ULTRAGARSAS, ISSN 1392-2114, Nr. 3(48), 2003, pp. 35-39) [Online]
65. Savioja, L., Lokki, T. and, Välimäki, V., "The interpolated 3-D digital waveguide mesh method for room acoustic simulation and auralization," In Joint Baltic-Nordic Acoustical Meeting, Lyngby, Denmark, August 25-28, 2002. (Paper published in ULTRAGARSAS, ISSN 1392-2114, Nr. 3(48), 2003, pp. 48-52) [Online]
66. Lokki, T., Pulkki, V., and Savioja, L., "The effect of early reflections to perceived timbre - Analyzed with an auditory model," In Proceedings of the 8th International Conference on Auditory Display (ICAD'2002), pp. 320-325, Kyoto, Japan, July 2-5, 2002. [Online (ICAD)]
67. Savioja, L., Lokki, T., and Huopaniemi, J., "Auralization applying the parametric room acoustic modeling technique - The DIVA auralization system," In Proceedings of the 8th International Conference on Auditory Display (ICAD'2002), pp. 219-224, Kyoto, Japan, July 2-5, 2002. [Online (ICAD)]
68. Lokki, T. and Pulkki, V., "Evaluation of geometry-based parametric auralization," In AES 22nd International Conference on Virtual, Synthetic and Entertainment Audio, pp. 367-376, Espoo, Finland, June 15-17, 2002. [Online (AES)]
69. Gröhn, M., Lokki, T., and Takala, T., "Static and dynamic sound source localization in a virtual room," In AES 22nd International Conference on Virtual, Synthetic and Entertainment Audio, pp. 337-344, Espoo, Finland, June 15-17, 2002. [Online (AES)]
70. Lokki, T., Svensson, P., and Savioja, L., "An Efficient Auralization of Edge Diffraction," In AES 21st International Conference on Architectural Acoustics & Sound Reinforcement, pp. 166-172, St. Petersburg, Russia, June 1-3, 2002. [Online (AES)]
71. Härmä, A., Lokki, T., and Pulkki, V., "Drawing quality maps of the sweet spot and its surroundings in multichannel reproduction and coding," In AES 21st International Conference on Architectural Acoustics & Sound Reinforcement, pp. 317-325, St. Petersburg, Russia, June 1-3, 2002. [Online (AES)]
72. Pulkki, V., Lokki, T., and Savioja, L., "Implementation and visualization of edge diffraction with image-source method," In AES 112nd International Convention, Munich, Germany, May 10-13, 2002, preprint nr. 5603. [Online (AES)]
73. Lokki, T. and Hiipakka, J., "A Time-Variant Reverberation Algorithm For Reverberation Enhancement Systems," In COST-G6 Conference on Digital Audio Effects (DAFx-01), pp. 28-32, Limerick, Ireland, December 6-8, 2001.[Online (DAFX)]
74. Merimaa, J., Lokki, T., Peltonen, T., and Karjalainen, M., "Measurement, Analysis, and Visualization of Directional Room Responses," In the AES 111st International Convention, New York, USA, November 30 - December 3, 2001, preprint nr. 5449. [Online (AES)]
75. Svensson, P., Savioja, L., Lokki, T., and Kristiansen, U., "Low-frequency models for room acoustic prediction," In Proc. 17th International Congress on Acoustics, paper 7B.09.03, Rome, Italy, September 2-7, 2001. [Online]
76. Gröhn, M., Lokki, T., and Savioja, L., "Using binaural hearing for localization in multimodal virtual environments," In Proc. 17th International Congress on Acoustics, paper 4P.32, Rome, Italy, September 2-7, 2001. [Online]
77. Lokki, T. and Järveläinen, H., "Subjective Evaluation of Auralization of Physics-based Room Acoustics Modeling," In Proc. 7th International Conference on Auditory Display (ICAD'2001), pp. 26-31, Espoo, Finland, July 29 - August 1, 2001. [Online (ICAD)]
78. Lokki, T., "Objective Comparison of Measured and Modeled Binaural Room Responses," In Proc. 8th International Congress on Sound and Vibration, pp. 2481-2488, Hong Kong, China, July 2-6, 2001. [Online]
79. Lokki, T., Hiipakka, J., and Savioja, L., "A framework for evaluating virtual acoustic environments," Presented at the AES 110th International Convention, Amsterdam, the Netherlands, May 12-15, 2001, preprint nr. 5137. [Online (AES)]
80. Peltonen, T., Lokki, T., Gouatarbes, B., Merimaa, J., and Karjalainen, M., "A System for Multi-Channel and Binaural Room Response Measurements," Presented at the AES 110th International Convention, Amsterdam, the Netherlands, May 12-15, 2001, preprint nr. 5289. [Online (AES)]
81. Hiipakka, J., Ilmonen, T., Lokki, T., Gröhn, M., and Savioja, L., "Implementation issues of 3D audio in a virtual room," in Proc. 13th Symposium of IS&T/SPIE, Electronic Imaging 2001, Vol. 4297B, pp. 486-495, San Jose, California, USA, January 21-26, 2001. [Online]
82. Gröhn, M., Lokki, T., Savioja, L., and Takala, T., "Some Aspects of Role of Audio in Immersive Visualization," in Proc. 13th Symposium of IS&T/SPIE, Electronic Imaging 2001, Vol. 4302, pp. 13-22, San Jose, California, USA, January 21-26, 2001. [Online]
83. Lokki, T. and Karjalainen, M., "An auditorily motivated analysis method for room impulse responses," in Proc. COST-G6 Conference on Digital Audio Effects (DAFx-00), pp. 55-60, Verona, Italy, December 7-9, 2000. [Online (DAFX)]
84. Lokki, T., Nummela, J., and Lahti, T., "An electro-acoustic enhancement system for rehearsal rooms," in Proc. EAA Symposium on Architectural Acoustics, paper AAQ06, Madrid, Spain, October 16-20, 2000. [Online]
85. Hiipakka, J., Ilmonen, T., Lokki, T., and Savioja, L., "Sound Signal Processing for a Virtual Room," in Proc. of the 10th European Signal Processing Conference (Eusipco2000), vol. 4, pp. 2221-2225, Tampere, Finland, September 5-8, 2000. [Online (Eurasip)]
86. Huopaniemi, J., Savioja, L., Lokki, T., and Väänänen, R., "Virtual Acoustics - Applications and Technology Trends," in Proc. of the 10th European Signal Processing Conference (Eusipco2000), vol. 4, pp. 2201-2209, Tampere, Finland, September 5-8, 2000. [Online (Eurasip)]
87. Lokki, T., Gröhn, M., Savioja, L., and Takala, T., "A Case Study of Auditory Navigation in Virtual Acoustic Environments," in Proceedings of the 6th International Conference on Auditory Display (ICAD'2000), pp. 145-150, Atlanta, Georgia USA, April 2-5, 2000. [Online (ICAD)]
88. Lokki, T., Hiipakka, J., and Savioja, L., "Immersive 3-D Sound Reproduction in a Virtual Room," in Proceedings AES 16th International conference on spatial sound reproduction, pp. 172-177, Rovaniemi, Finland, April 10-12, 1999. [Online (AES)]
89. Lokki, T., Savioja, L., Huopaniemi, J., Hänninen, R., Ilmonen, T., Hiipakka, J., Pulkki, V., Väänänen, R., and Takala, T. "Virtual Concerts in Virtual Spaces - in Real Time," (Invited paper) Joint ASA/EAA Meeting, Berlin, Germany, March 14-19, 1999. [Online]
90. Piirilä, E., Lokki, T., and Välimäki, V. "Digital Signal Processing Techniques for Non-exponentially Decaying Reverberation," in Proceedings 98 Digital Audio Effects Workshop (DAFX'98), pp. 21-24, Barcelona, Spain, Nov. 19-21, 1998. [Online (DAFX)]
91. Pulkki, V. and Lokki, T., "Creating Auditory Displays with Multiple Loudspeakers using VBAP: A Case Study with DIVA project," in Proc. of the 5th International Confonference on Auditory Display (ICAD'98), Glasgow, UK, Nov. 1-4, 1998. [Online (ICAD)]
92. Lokki, T., Väänänen, R., Savioja, L., and Huopaniemi, J., "Advanced 3-D audio in an interactive multimedia environment," in Proc. IEEE Nordic Signal Processing Symposium (NORSIG'98), pp. 201-204, Vigsø, Denmark, June 8-11, 1998. [Online]
93. Savioja, L., Huopaniemi, J., Lokki, T., and Väänänen, R. "Virtual environment simulation - Advances in the DIVA project," in Proc. of the 4th International Confonference on Auditory Display (ICAD'97), pp. 43-46., Palo Alto, California, USA, Nov. 3-5, 1997. [Online (ICAD)]

Technical Reports

1. Vesa, S. and Lokki, T. "Segmentation and Analysis of Early Reflections from a Binaural Room Impulse Response," in L. Hirvisalo (ed.): TKK Reports in Media Technology,Technical Report TKK-ME-R-1, 10 p., Helsinki University of Technology, Espoo, Finland, 2009. [Online]

International Other Media

1. Pulkki, V., Faller, C., Härmä, A., Lokki, T., and de Bruijn, W. "Editorial: Special Issue on Spatial Sound and Virtual Acoustics," EURASIP Journal on Advances in Signal Processing, vol. 2007, Article ID 72647, 3 pages, 2007. [Online]
2. Merimaa, J., Peltonen, T., and Lokki, T. "Concert Hall Impulse Responses - Pori, Finland," A download site for a set of concert hall impulse responses. The responses are provided free for noncommercial purpose, May 2005.
3. Takala, T., Rousku, E., Lokki, T., Savioja, L., Huopaniemi, J., Väänänen, R., Pulkki, V., and Salminen, P. "MARIENKIRCHE - A visual and aural demonstration film," Presented at SIGGRAPH'98 Computer Animation Festival (Electronic Theater). Electronic Art and Animation Catalogue, pp. 149, Jul. 1998. [Online (ACM)]
   Also presented [invited] at film festivals:
• London Effects & Animation Festival. [competition finalist] London 1998.
• Cartoombria Special, Italy, 1998.
• Sydney Animation Festival. Sydney 1999.
• 3D Festival. Malmö, Sweden, 6-8 October 1999.
4. DIVA-Group: (Hiipakka, J., Hänninen, R., Ilmonen, T., Napari, H., Lokki, T., Savioja, L., Huopaniemi, J., Karjalainen, M., Tolonen,T., Välimäki, S., and Takala, T.), "Virtual orchestra performance," [interactive installation] in Electric Garden. Proc. Siggraph'97 Visual Proceedings, pp. 81, Aug. 1997. [Online (ACM)]

Patents

1. Helsinki Univ. of Technology (Kajastila, R., Vehviläinen, J., and Lokki, T.), "Menetelmä laitteen ohjaamiseksi" Finnish Patent Application FI20095835. Filed 12.8.2009.
2. Helsinki Univ. of Technology (Kajastila, R. and Lokki, T.), "Menetelmä laitteen ohjaamiseksi" Finnish Patent Application FI20095736. Filed 6.4.2009.
3. Helsinki Univ. of Technology (Kajastila, R. and Lokki, T.), "Menetelmä ja laite sovelluksen ohjaamiseksi" Finnish Patent Application FI20080591. Filed 24.10.2008. In addition, patent application PCT/FI2009/050856
4. Helsinki Univ. of Technology (Lokki, T., Merimaa, J., and Pulkki, V.), A method for reproducing natural or modified spatial impression in multichannel listening, Finnish Patent FI 118247 B. Granted 31.8.2007. In addition patent applications JP 2006502072, and US 10/547,151. [Online (Espacenet)]
5. Helsinki Univ. of Technology (Hiipakka, J., Lokki, T., and Savioja, L.), "Menetelmä kaikulaitteessa ja kaikulaite" Finnish Patent FI 111571 B. Granted 15.8.2003. [Online (Espacenet)]

National Journal and Conference Articles (in Finnish)

1. Lokki, T. Pätynen, J., and Vertanen, H., "Suomalaisten konserttisalien vertailu aistinvaraisin menetelmin," Akustiikkapäivät 2011, Tampere, pp. 215-220, May 11-12, 2011. [Online]
2. Pätynen, J., Southern, A., and Lokki, T., "Konserttisalien akustiikan aika-taajuusvaste ja sen vaikutus havaittuun äänenlaatuun," Akustiikkapäivät 2011, Tampere, pp. 227-232, May 11-12, 2011. [Online]
3. Pätynen, J., Lokki, T., "Sinfoniaorkesteri herätteenä auralisaatiossa," Akustiikkapäivät 2009, Vaasa, pp. 100-105, May 14-15, 2009. [Online]
4. Siltanen, S., Lokki, T., "Huoneakustiikan mallinnus virtuaalisella äänikenttäsynteesillä," Akustiikkapäivät 2009, Vaasa, pp. 186-191, May 14-15, 2009. [Online]
5. Pätynen, J., Lokki, T., "Virtuaaliakustiikalla parempia musiikin opetus- ja harjoitustiloja?," Akustiikkapäivät 2007, Espoo, pp. 57-64, Sept. 27-28, 2007. [Online] Published also in Rakenteiden Mekaniikka, Vol. 41, Nr. 1, pp. 8-16, 2008
6. Savioja, L., Siltanen, S., Lokki, T., "Geometrisen huoneakustiikan renderöintiyhtälö," Akustiikkapäivät 2007, Espoo, pp. 71-76, Sept. 27-28, 2007. [Online] Published also in Rakenteiden Mekaniikka, Vol. 41, Nr. 1, pp. 25-30, 2008
7. Lokki, T. (editor), "Proceedings of the Baltic-Nordic Acoustics Meeting," Akustinen Seura ry, Mariehamn, June 8-10, 2004. [Online]
8. Lokki, T., "Konserttisaliakustiikan subjektiivinen arviointi perustuen binauraalisiin impulssivasteisiin," Akustiikkapäivät 2003, Turku, pp. 140-145, Oct. 6-7, 2003. [Online]
9. Lokki, T. and Savioja, L., "Huoneakustiikan mallinnus ja auralisaatio - katsaus nykytutkimukseen," Akustiikkapäivät 2001, Espoo, pp. 129-134, Oct. 8-9, 2001. [Online]
10. Lokki, T. (editor), "Akustiikkapäivät 2001," Akustinen Seura ry, Espoo, 137 p., Oct. 8-9, 2001. [Online]
11. Lokki, T. (editor), "Akustiikkapäivät 1999," Akustinen Seura ry, Tampere, 141 p., Oct. 4-5, 1999.
12. Lokki, T., "Aallokkeet äänisignaalien käsittelyssä," In: Välimäki, V. and Karjalainen, M. (editors), "Signaalinkäsittely audiotekniikassa, akustiikassa ja musiikissa," Teknillinen korkeakoulu, Akustiikan ja äänenkäsittelytekniikan laboratorio, Report no. 50, pp. 257-276, 1998.
13. Lokki, T. and Savioja, L., "Auralisointidemonstraation toteuttaminen," Proc. Akustiikkapäivät 1997, Espoo, pp. 101-106, Oct. 8-9, 1997.
14. Lokki, T., "Reaaliaikaiset kuvalähdemenetelmät," In: Karjalainen, M., Backman, J., Savioja, L. (editors), "Akustiikan laskennallinen mallintaminen," Teknillinen korkeakoulu, Akustiikan ja äänenkäsittelytekniikan laboratorio, Report no. 44, pp. 63-82, 1997.
15. Lokki, T., "Jatkuvaherätteiset ja epälineaariset mallit," In: Karjalainen, M., Välimäki, V. (editors), "Akustisten järjestelmien diskreettiaikaiset mallit ja soittimien mallipohjainen äänisynteesi," Teknillinen korkeakoulu, Akustiikan ja äänenkäsittelytekniikan laboratorio, Report no. 39, pp. 151-162, 1995.
16. Lokki, T., "Kuuntelukokeet," In: Backman, J., Huopaniemi, J., Rahkila, M. (editors), "Tilakuuleminen ja auralisaatio," Teknillinen korkeakoulu, Akustiikan ja äänenkäsittelytekniikan laboratorio, Report No. 36, pp. 59-67, 1995.

Invited Talks and Other Presentations

1. Lokki, T. and Savioja, L., "Room Acoustics Modeling," Tutorial, In the AES 124th International Convention, Amsterdam, the Netherlands, May 17-20, 2008. [Slides online]
2. Lokki, T., Savioja, L., and Takala, T., "Experimental Virtual Environments Group at the Helsinki University of Technology," IEEE Virtual Reality 2005, Session "Lab Presentations", Bonn, Germany, March 12-16, 2005. In addition, "A Virtual Rock Guitar," was demonstrated in "Lab Demos".
3. Lokki, T. and Gröhn, M., "Navigation with auditory cues in virtual environment," IEEE Virtual Reality 2004, Workshop on "VR for Public Consumption", Chicago, IL, USA, March 27-31, 2004.
4. Lokki, T., "The use of 3-D audio in virtual environments," The 3rd CAVE Programming Workshop, Espoo, Finland, August 27-29, 2003.
5. Savioja, L., Lokki, T., and Gröhn, M., "Auditory Displays in Virtual Rooms," Tutorial, 7th International Conference on Auditory Display (ICAD'2001), Espoo, Finland, July 29 - August 1, 2001.
6. Lokki, T. and Savioja, L., "The DIVA auralization system," ACM Siggraph Campfire: Acoustic Rendering for Virtual Environmens, Snowbird, Utah, May 26-29, 2001.
7. Savioja, L. and Lokki, T., "Digital Waveguide Mesh for Room Acoustic Modeling," ACM Siggraph Campfire: Acoustic Rendering for Virtual Environmens, Snowbird, Utah, May 26-29, 2001.
8. Huopaniemi, J., Pulkki, V., and Lokki, T., "Psychophysics and Technology of Virtual Acoustic Displays," Tutorial, International Conference on Auditory Display (ICAD'98), Glasgow, Nov. 1-4, 1998.

Last updated: 5th December 2011

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