Sound field control for a low-frequency test facility

Christian Sejer Pedersen, Henrik Møller

Publikation: Bidrag til bog/antologi/rapport/konference proceedingKonferenceartikel i proceedingForskningpeer review

5 Citationer (Scopus)

Resumé

The two largest problems in controlling the reproduction of low-frequency sound for psychoacoustic experiments is the effect of the room due to standing waves and the relatively large sound pressure levels needed. Anechoic rooms are
limited downward in frequency and distortion may be a problem even at moderate levels, while pressure-field playback can give higher sound pressures but is limited upwards in frequency. A new solution that addresses both problems has been implemented in the laboratory of Acoustics, Aalborg University. The solution uses one wall with 20 loudspeakers to generate a plane wave that is actively absorbed when it reaches the 20 loudspeakers on the opposing wall. This gives a homogeneous sound field in the majority of the room with a flat frequency response in the frequency range 2-300 Hz. The lowest frequencies are limited to sound pressure levels in the order of 95 dB. If larger levels are needed, a hybrid mode can be used to utilize the pressure-field conditions at frequencies up to approx. 30 Hz while the higher frequencies are controlled by plane-wave generation. This approach allows for playback of levels at the lowest frequencies in the order of 125 dB while still maintaining a homogeneous sound field for the entire frequency range 2-300 Hz.
OriginalsprogEngelsk
TitelProceedings of AES 52nd International Conference : Sound Field Control
Antal sider10
ForlagAudio Engineering Society
Publikationsdato2013
Artikelnummer8-1
StatusUdgivet - 2013
BegivenhedAES 52nd International Conference - Guildford, Storbritannien
Varighed: 2 sep. 20134 sep. 2013
Konferencens nummer: 52nd

Konference

KonferenceAES 52nd International Conference
Nummer52nd
LandStorbritannien
ByGuildford
Periode02/09/201304/09/2013

Fingerprint

test facilities
sound fields
low frequencies
sound pressure
rooms
playbacks
loudspeakers
pressure distribution
plane waves
frequency ranges
psychoacoustics
acoustics
wave generation
standing waves
frequency response

Citer dette

Pedersen, C. S., & Møller, H. (2013). Sound field control for a low-frequency test facility. I Proceedings of AES 52nd International Conference: Sound Field Control [8-1] Audio Engineering Society.
Pedersen, Christian Sejer ; Møller, Henrik. / Sound field control for a low-frequency test facility. Proceedings of AES 52nd International Conference: Sound Field Control. Audio Engineering Society, 2013.
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Pedersen, CS & Møller, H 2013, Sound field control for a low-frequency test facility. i Proceedings of AES 52nd International Conference: Sound Field Control., 8-1, Audio Engineering Society, Guildford, Storbritannien, 02/09/2013.

Sound field control for a low-frequency test facility. / Pedersen, Christian Sejer; Møller, Henrik.

Proceedings of AES 52nd International Conference: Sound Field Control. Audio Engineering Society, 2013. 8-1.

Publikation: Bidrag til bog/antologi/rapport/konference proceedingKonferenceartikel i proceedingForskningpeer review

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Pedersen CS, Møller H. Sound field control for a low-frequency test facility. I Proceedings of AES 52nd International Conference: Sound Field Control. Audio Engineering Society. 2013. 8-1