Computationally Efficient Parametric Filter Approximations for Sound-Source Directivity and Head-Related Impulse Responses

2021 ◽  
Author(s):  
Stephan D. Ewert ◽  
Oliver Buttler ◽  
Hongmei Hu
Keyword(s):  
Sound Source ◽  
Impulse Responses ◽  
Computationally Efficient ◽  
Source Directivity ◽  
Parametric Filter

scholarly journals Diffuse-Field Equalisation of Binaural Ambisonic Rendering

2018 ◽  
Vol 8 (10) ◽  
pp. 1956 ◽  
Author(s):  
Thomas McKenzie ◽  
Damian Murphy ◽  
Gavin Kearney
Keyword(s):  
Virtual Reality ◽  
Frequency Response ◽  
Sound Source ◽  
High Frequency ◽  
Sagittal Plane ◽  
Impulse Responses ◽  
Spectral Difference ◽  
High Frequencies ◽  
Listening Tests ◽  
Frequency Reproduction

Ambisonics has enjoyed a recent resurgence in popularity due to virtual reality applications. Low order Ambisonic reproduction is inherently inaccurate at high frequencies, which causes poor timbre and height localisation. Diffuse-Field Equalisation (DFE), the theory of removing direction-independent frequency response, is applied to binaural (over headphones) Ambisonic rendering to address high-frequency reproduction. DFE of Ambisonics is evaluated by comparing binaural Ambisonic rendering to direct convolution via head-related impulse responses (HRIRs) in three ways: spectral difference, predicted sagittal plane localisation and perceptual listening tests on timbre. Results show DFE successfully improves frequency reproduction of binaural Ambisonic rendering for the majority of sound source locations, as well as the limitations of the technique, and set the basis for further research in the field.

The Assessment of Sports Halls – The Analysis of Reverberation Time, Strength and Clarity

2014 ◽  
Vol 899 ◽  
pp. 517-521
Author(s):  
Martin Jedovnický ◽  
Peter Tomašovič
Keyword(s):  
Sound Source ◽  
In Situ Measurement ◽  
Reverberation Time ◽  
Impulse Responses ◽  
Frequency Range ◽  
Time Strength

This article presents the results of analysis of impulse responses which were obtained from in situ measurement in sports hall called Karlovka. The experiment deals with the comparison of two positions of the measuring microphone which had the identical distance from the sound source and the reverberation time was different in the whole frequency range. The attention was focused on the analysis of suitability of Reverberation time RT, Strength G and Clarity C80 to be used for the assessment of sports halls.

Sound Source and Microphone Localization From Acoustic Impulse Responses

2016 ◽  
Vol 23 (10) ◽  
pp. 1459-1463 ◽  
Author(s):  
Daniele Salvati ◽  
Carlo Drioli ◽  
Gian Luca Foresti
Keyword(s):  
Sound Source ◽  
Impulse Responses

Effects of sound source directivity on auralizations

2002 ◽  
Vol 111 (5) ◽  
pp. 2331
Author(s):  
Nathan W. Sheets ◽  
Lily M. Wang
Keyword(s):  
Sound Source ◽  
Source Directivity

Reproduction of Phantom Sources Improves with Separation of Direct and Reflected Sounds

2015 ◽  
Vol 40 (4) ◽  
pp. 575-584
Author(s):  
Piotr Kleczkowski ◽  
Aleksandra Król ◽  
Paweł Małecki
Keyword(s):  
Sound Source ◽  
Sound Field ◽  
Angular Separation ◽  
Impulse Responses ◽  
Sound Sources ◽  
Perceptual Effect ◽  
Multichannel Systems ◽  
Virtual Acoustics

AbstractIn virtual acoustics or artificial reverberation, impulse responses can be split so that direct and reflected components of the sound field are reproduced via separate loudspeakers. The authors had investigated the perceptual effect of angular separation of those components in commonly used 5.0 and 7.0 multichannel systems, with one and three sound sources respectively (Kleczkowski et al., 2015, J. Audio Eng. Soc. 63, 428-443). In that work, each of the front channels of the 7.0 system was fed with only one sound source. In this work a similar experiment is reported, but with phantom sound sources between the front loud- speakers. The perceptual advantage of separation was found to be more consistent than in the condition of discrete sound sources. The results were analysed both for pooled listeners and in three groups, according to experience. The advantage of separation was the highest in the group of experienced listeners.

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