Application of an ambisonic microphone for the measurements of room acoustic parameters

• Autorzy: Jasiński Maciej , Żera Jan

Identyfikatory

DOI

10.21008/j.0860-6897.2022.3.12

• Języki publikacji: EN

Abstrakty

EN

The most commonly used measurement technique in room acoustics employs a single omnidirectional microphone for recording the room impulse response and further derivation of such acoustical parameters as T30, EDT, C50 or C80. Instead, ambisonic technology makes it possible to measure a spatial room impulse response. Ambisonics decomposes the signal from the spherical microphone array into spherical harmonics to shape the directivity. Ambisonics lets to go beyond basic acoustical parameters and allows to determine spatial features of a sound field at the measurement point. This study presents the comparison of fundamental acoustic parameters measured in the recording studio by an actual omnidirectional microphone and virtual omnidirectional microphones derieved from ambisonic microphones of the first and third order. The results show the usefulness of ambisonic technology in terms of assessing basic room parameters.

Słowa kluczowe

EN

room acoustics; ambisonics; spatial impulse response; acoustical measurements

PL

akustyka wnętrz; ambisonia; przestrzenna odpowiedź impulsowa; pomiary akustyczne

• Wydawca: Poznan University of Technology. Institute of Applied Mechanics
• Czasopismo: Vibrations in Physical Systems
• Rocznik: 2022
• Tom: Vol. 33, nr 3
• Strony: art. no. 2022312
• Opis fizyczny: Bibliogr. 8 poz., rys., 1 wykr.

Twórcy

autor

Jasiński Maciej

• Institute of Radioelectronics and Multimedia Technology, Faculty of Electronics and Information Technology, Warsaw University of Technology, Nowowiejska 15/19, 00-665 Warsaw

• https://orcid.org/0000-0002-7826-4650

autor

Żera Jan

• Institute of Radioelectronics and Multimedia Technology, Faculty of Electronics and Information Technology, Warsaw University of Technology, Nowowiejska 15/19, 00-665 Warsaw

• https://orcid.org/0000-0002-2175-6910

Bibliografia

• 1. M. Vorländer; Auralization. Springer: Cham, 2020.
• 2. A. Farina, R. Ayalon; Recording concert hall acoustics for posterity; In: 24th AES International Conference: Multichannel Audio - The New Reality, Banff, Canada, June 26-28, 2003.
• 3. D. Protheroe, B. Guillemin; 3D impulse response measurements of spaces using an inexpensive microphone array; Building Acoustics 2013, 20(2), 141-155.
• 4. PN-EN ISO 3382-1:2009, Akustyka - Pomiar parametrów akustycznych pomieszczeń - Część 1: Pomieszczenia specjalne, 2009.
• 5. B. Rafaely; Fundamentals of Spherical Array Processing; Springer: Heidelberg, Germany, 2018.
• 6. S. Campanini, A. Farina; A new Audacity feature: room objective acoustical parameters calculation module; Linux Audio Conference, Parma, Italy, April 16-19, 2009; paper B.
• 7. Ambeo A-B Converter; https://en-us.sennheiser.com/ambeo-abconverter (accessed 22.07.2022).
• 8. Zylia Ambisonics Converter; https://www.zylia.co/zylia-ambisonics-converter.html (accessed 22.07.2022).

Uwagi

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023).