GB2384413A - Sound reproduction systems - Google Patents

Sound reproduction systems

Info

Publication number
GB2384413A
GB2384413A GB0300637A GB0300637A GB2384413A GB 2384413 A GB2384413 A GB 2384413A GB 0300637 A GB0300637 A GB 0300637A GB 0300637 A GB0300637 A GB 0300637A GB 2384413 A GB2384413 A GB 2384413A
Authority
GB
United Kingdom
Prior art keywords
transducer
pairs
different
span
sound
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB0300637A
Other versions
GB2384413B (en
GB0300637D0 (en
Inventor
Philip Arthur Nelson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Adaptive Audio Ltd
Original Assignee
Adaptive Audio Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Adaptive Audio Ltd filed Critical Adaptive Audio Ltd
Publication of GB0300637D0 publication Critical patent/GB0300637D0/en
Publication of GB2384413A publication Critical patent/GB2384413A/en
Application granted granted Critical
Publication of GB2384413B publication Critical patent/GB2384413B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S5/00—Pseudo-stereo systems, e.g. in which additional channel signals are derived from monophonic signals by means of phase shifting, time delay or reverberation 
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/26—Spatial arrangements of separate transducers responsive to two or more frequency ranges
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2205/00—Details of stereophonic arrangements covered by H04R5/00 but not provided for in any of its subgroups
    • H04R2205/024—Positioning of loudspeaker enclosures for spatial sound reproduction
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S2400/00—Details of stereophonic systems covered by H04S but not provided for in its groups
    • H04S2400/05—Generation or adaptation of centre channel in multi-channel audio systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S2420/00—Techniques used stereophonic systems covered by H04S but not provided for in its groups
    • H04S2420/01—Enhancing the perception of the sound image or of the spatial distribution using head related transfer functions [HRTF's] or equivalents thereof, e.g. interaural time difference [ITD] or interaural level difference [ILD]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S3/00—Systems employing more than two channels, e.g. quadraphonic
    • H04S3/002—Non-adaptive circuits, e.g. manually adjustable or static, for enhancing the sound image or the spatial distribution

Abstract

A sound reproduction system has pairs of sound emitters that subtend different angles R , the span angle, at the listener position. The pairs of sound emitters are arranged to be excited by different frequency bands of the signal output from an inverse filter means (H h , H 1 ). The operational span-frequency range of the pairs of sound emitters is determined by an equation (I) where the transducer span R is the angle subtended at the listener by a pair of transducers, where O < n < 2. c 0 : is the speed of sound, and W r: is the equivalent distance between the ears. The sound emitters may be discrete speaker units, the different pairs of units being positioned at different span angles, or they be constituted by area portions of an extended transducer (Fig. 10). When discrete speaker units are employed a cross-over filter (Fig. 28) is used to provide drive signals in the different frequency bands to the different speaker pairs. When an extended transducer is employed, the vibration transmission characteristics of the transducer may be arranged to filter the vibrations transmitted along the transducer from an excitation means positioned at the higher frequency emitting end of the transducer.
GB0300637A 2000-06-24 2001-06-22 Sound reproduction systems Expired - Lifetime GB2384413B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB0015419.5A GB0015419D0 (en) 2000-06-24 2000-06-24 Sound reproduction systems
PCT/GB2001/002759 WO2002001916A2 (en) 2000-06-24 2001-06-22 Sound reproduction systems

Publications (3)

Publication Number Publication Date
GB0300637D0 GB0300637D0 (en) 2003-02-12
GB2384413A true GB2384413A (en) 2003-07-23
GB2384413B GB2384413B (en) 2005-01-05

Family

ID=9894264

Family Applications (2)

Application Number Title Priority Date Filing Date
GBGB0015419.5A Ceased GB0015419D0 (en) 2000-06-24 2000-06-24 Sound reproduction systems
GB0300637A Expired - Lifetime GB2384413B (en) 2000-06-24 2001-06-22 Sound reproduction systems

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GBGB0015419.5A Ceased GB0015419D0 (en) 2000-06-24 2000-06-24 Sound reproduction systems

Country Status (5)

Country Link
US (1) US6950524B2 (en)
JP (1) JP4174318B2 (en)
AU (1) AU2001274306A1 (en)
GB (2) GB0015419D0 (en)
WO (1) WO2002001916A2 (en)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070165890A1 (en) * 2004-07-16 2007-07-19 Matsushita Electric Industrial Co., Ltd. Sound image localization device
JP2008187213A (en) * 2005-05-19 2008-08-14 D & M Holdings Inc Audio signal processing device, speaker box, speaker system, and video/audio output device
JP2006339694A (en) * 2005-05-31 2006-12-14 D & M Holdings Inc Audio signal output device
US8135137B2 (en) * 2006-03-13 2012-03-13 Panasonic Corporation Sound image localization apparatus
JP4969978B2 (en) * 2006-10-02 2012-07-04 三菱電機株式会社 Audio playback device
EP1962559A1 (en) * 2007-02-21 2008-08-27 Harman Becker Automotive Systems GmbH Objective quantification of auditory source width of a loudspeakers-room system
WO2008142912A1 (en) * 2007-05-18 2008-11-27 D & M Holdings Inc. Audio signal processing device and audio signal processing method
GB0712998D0 (en) * 2007-07-05 2007-08-15 Adaptive Audio Ltd Sound reproducing systems
CN103222187B (en) 2010-09-03 2016-06-15 普林斯顿大学托管会 For being eliminated by the non-staining optimization crosstalk of the frequency spectrum of the audio frequency of speaker
KR101827032B1 (en) 2010-10-20 2018-02-07 디티에스 엘엘씨 Stereo image widening system
EP2816824B1 (en) * 2013-05-24 2020-07-01 Harman Becker Automotive Systems GmbH Sound system for establishing a sound zone
EP3061268B1 (en) 2013-10-30 2019-09-04 Huawei Technologies Co., Ltd. Method and mobile device for processing an audio signal
US10163295B2 (en) 2014-09-25 2018-12-25 Konami Gaming, Inc. Gaming machine, gaming machine control method, and gaming machine program for generating 3D sound associated with displayed elements
US9560464B2 (en) 2014-11-25 2017-01-31 The Trustees Of Princeton University System and method for producing head-externalized 3D audio through headphones
CA2972300C (en) 2015-02-18 2019-12-31 Huawei Technologies Co., Ltd. An audio signal processing apparatus and method for filtering an audio signal
US10595150B2 (en) * 2016-03-07 2020-03-17 Cirrus Logic, Inc. Method and apparatus for acoustic crosstalk cancellation
GB2556663A (en) 2016-10-05 2018-06-06 Cirrus Logic Int Semiconductor Ltd Method and apparatus for acoustic crosstalk cancellation
JP6889883B2 (en) * 2017-09-07 2021-06-18 日本放送協会 Controller design equipment and programs for acoustic signals

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997030566A1 (en) * 1996-02-16 1997-08-21 Adaptive Audio Limited Sound recording and reproduction systems
WO1998054926A1 (en) * 1997-05-28 1998-12-03 Bauck Jerald L Loudspeaker array for enlarged sweet spot

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5351295A (en) * 1993-07-01 1994-09-27 Digital Equipment Corporation Secure method of neighbor discovery over a multiaccess medium
US6633648B1 (en) * 1999-11-12 2003-10-14 Jerald L. Bauck Loudspeaker array for enlarged sweet spot

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997030566A1 (en) * 1996-02-16 1997-08-21 Adaptive Audio Limited Sound recording and reproduction systems
WO1998054926A1 (en) * 1997-05-28 1998-12-03 Bauck Jerald L Loudspeaker array for enlarged sweet spot

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
J. Audio Engineering Society, vol 44, no 9, pages 683-705 *

Also Published As

Publication number Publication date
AU2001274306A1 (en) 2002-01-08
GB2384413B (en) 2005-01-05
US6950524B2 (en) 2005-09-27
JP4174318B2 (en) 2008-10-29
JP2004511118A (en) 2004-04-08
US20030161478A1 (en) 2003-08-28
WO2002001916A3 (en) 2003-05-08
GB0015419D0 (en) 2000-08-16
WO2002001916A2 (en) 2002-01-03
GB0300637D0 (en) 2003-02-12

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Legal Events

Date Code Title Description
PE20 Patent expired after termination of 20 years

Expiry date: 20210621