Sound Zones: On Envelope Shaping of FIR Filters

Martin Bo Møller; Martin Olsen

Sound Zones: On Envelope Shaping of FIR Filters

Martin Bo Møller, Martin Olsen

Research output: Contribution to book/anthology/report/conference proceeding › Article in proceeding › Research › peer-review

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Abstract

Sound zones, i.e. spatially confined regions of individual audio content, can be created by appropriate filtering of the desired audio signals reproduced by an array of loudspeakers. The challenge of designing filters for sound zones is twofold: First, the filtered responses should generate an acoustic separation between the control regions. Secondly, the pre- and post-ringing as well as
spectral deterioration introduced by the filters should be minimized. The tradeoff between acoustic separation and filter ringing is the focus of this paper. A weighted L2-norm penalty is introduced in the sound zones optimization problem, to reduce pre- and post-ringing of the filters. The effect of shaping the filter envelopes is investigated in an experimental setup with eight woofers,
surrounding two control regions. The results show that it is possible to reduce the pre- and postringing of the filters without significantly reducing the acoustic separation between the zones.

Original language	English
Title of host publication	24th International Congress on Sound and Vibration 2017 (ICSV 24)
Number of pages	8
Publisher	The International Institute of Acoustics and Vibration (IIAV)
Publication date	23 Jul 2017
Pages	613-620
ISBN (Print)	9781510845855
ISBN (Electronic)	978-1-906913-27-4
Publication status	Published - 23 Jul 2017
Event	24th International Congress on Sound and Vibration, ICSV24 - London, United Kingdom Duration: 23 Jul 2017 → 27 Jul 2017 Conference number: 24

Conference

Conference	24th International Congress on Sound and Vibration, ICSV24
Number	24
Country/Territory	United Kingdom
City	London
Period	23/07/2017 → 27/07/2017

Series	International Congress on Sound and Vibration (ICSV)
ISSN	2329-3675

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title = "Sound Zones: On Envelope Shaping of FIR Filters",

abstract = "Sound zones, i.e. spatially confined regions of individual audio content, can be created by appropriate filtering of the desired audio signals reproduced by an array of loudspeakers. The challenge of designing filters for sound zones is twofold: First, the filtered responses should generate an acoustic separation between the control regions. Secondly, the pre- and post-ringing as well asspectral deterioration introduced by the filters should be minimized. The tradeoff between acoustic separation and filter ringing is the focus of this paper. A weighted L2-norm penalty is introduced in the sound zones optimization problem, to reduce pre- and post-ringing of the filters. The effect of shaping the filter envelopes is investigated in an experimental setup with eight woofers,surrounding two control regions. The results show that it is possible to reduce the pre- and postringing of the filters without significantly reducing the acoustic separation between the zones.",

author = "M{\o}ller, {Martin Bo} and Martin Olsen",

year = "2017",

month = jul,

day = "23",

language = "English",

isbn = "9781510845855",

series = "International Congress on Sound and Vibration (ICSV)",

publisher = "The International Institute of Acoustics and Vibration (IIAV)",

pages = "613--620",

booktitle = "24th International Congress on Sound and Vibration 2017 (ICSV 24)",

note = "24th International Congress on Sound and Vibration, ICSV24, ICSV24 ; Conference date: 23-07-2017 Through 27-07-2017",

}

Møller, MB & Olsen, M 2017, Sound Zones: On Envelope Shaping of FIR Filters. in 24th International Congress on Sound and Vibration 2017 (ICSV 24) . The International Institute of Acoustics and Vibration (IIAV), International Congress on Sound and Vibration (ICSV), pp. 613-620, 24th International Congress on Sound and Vibration, ICSV24, London, United Kingdom, 23/07/2017.

Sound Zones: On Envelope Shaping of FIR Filters. / Møller, Martin Bo; Olsen, Martin.
24th International Congress on Sound and Vibration 2017 (ICSV 24) . The International Institute of Acoustics and Vibration (IIAV), 2017. p. 613-620 (International Congress on Sound and Vibration (ICSV)).

Research output: Contribution to book/anthology/report/conference proceeding › Article in proceeding › Research › peer-review

TY - GEN

T1 - Sound Zones

T2 - 24th International Congress on Sound and Vibration, ICSV24

AU - Møller, Martin Bo

AU - Olsen, Martin

N1 - Conference code: 24

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Y1 - 2017/7/23

N2 - Sound zones, i.e. spatially confined regions of individual audio content, can be created by appropriate filtering of the desired audio signals reproduced by an array of loudspeakers. The challenge of designing filters for sound zones is twofold: First, the filtered responses should generate an acoustic separation between the control regions. Secondly, the pre- and post-ringing as well asspectral deterioration introduced by the filters should be minimized. The tradeoff between acoustic separation and filter ringing is the focus of this paper. A weighted L2-norm penalty is introduced in the sound zones optimization problem, to reduce pre- and post-ringing of the filters. The effect of shaping the filter envelopes is investigated in an experimental setup with eight woofers,surrounding two control regions. The results show that it is possible to reduce the pre- and postringing of the filters without significantly reducing the acoustic separation between the zones.

AB - Sound zones, i.e. spatially confined regions of individual audio content, can be created by appropriate filtering of the desired audio signals reproduced by an array of loudspeakers. The challenge of designing filters for sound zones is twofold: First, the filtered responses should generate an acoustic separation between the control regions. Secondly, the pre- and post-ringing as well asspectral deterioration introduced by the filters should be minimized. The tradeoff between acoustic separation and filter ringing is the focus of this paper. A weighted L2-norm penalty is introduced in the sound zones optimization problem, to reduce pre- and post-ringing of the filters. The effect of shaping the filter envelopes is investigated in an experimental setup with eight woofers,surrounding two control regions. The results show that it is possible to reduce the pre- and postringing of the filters without significantly reducing the acoustic separation between the zones.

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M3 - Article in proceeding

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T3 - International Congress on Sound and Vibration (ICSV)

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EP - 620

BT - 24th International Congress on Sound and Vibration 2017 (ICSV 24)

PB - The International Institute of Acoustics and Vibration (IIAV)

Y2 - 23 July 2017 through 27 July 2017

ER -

Sound Zones: On Envelope Shaping of FIR Filters

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