CN101711005A - Device for improving outgoing loudspeaker responses - Google Patents

Device for improving outgoing loudspeaker responses Download PDF

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Publication number
CN101711005A
CN101711005A CN 200910234220 CN200910234220A CN101711005A CN 101711005 A CN101711005 A CN 101711005A CN 200910234220 CN200910234220 CN 200910234220 CN 200910234220 A CN200910234220 A CN 200910234220A CN 101711005 A CN101711005 A CN 101711005A
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CN
China
Prior art keywords
cavity
loudspeaker
responses
frequency
partition board
Prior art date
Application number
CN 200910234220
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Chinese (zh)
Other versions
CN101711005B (en
Inventor
葛俊
邱小军
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南京大学
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Publication date
Application filed by 南京大学 filed Critical 南京大学
Priority to CN 200910234220 priority Critical patent/CN101711005B/en
Publication of CN101711005A publication Critical patent/CN101711005A/en
Application granted granted Critical
Publication of CN101711005B publication Critical patent/CN101711005B/en

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Abstract

The invention discloses a device for improving outgoing loudspeaker responses, particularly relating to a device for improving medium-high frequency responses of outgoing loudspeakers of terminals, such as mobile telephones and the like. The device for improving outgoing loudspeaker responses comprises a minitype loudspeaker, a back cavity and a front cavity, wherein the minitype loudspeaker is used for converting an input electric signal into a corresponding acoustic signal; the back cavity is fixed to the back side of the loudspeaker diaphragm; the front cavity is fixed to the front side of the loudspeaker diaphragm; the front cavity is divided by a first partition board into a first subcavity and a second subcavity; the first partition board and the second partition board are provided with holes; and the device is coupled with the outside region through the hole in the second partition board. The resonance of the two subcavities of the front cavity can be controlled by changing the geometric dimensions of the front cavity, thereby effectively enhancing the responses of the frequency range corresponding to the medium-high frequency.

Description

A kind of device that improves outgoing loudspeaker responses
One, technical field
The present invention relates to a kind of device that improves outgoing loudspeaker responses, in particular to a kind of device of medium-high frequency response of the outgoing loudspeaker that improves terminal such as mobile phone.
Two, background technology
At present, the use of terminals such as mobile phone and MP3 more and more widely, people are also more and more higher to the requirement of the outer playing function of these terminals.The attached cavity body structure of loud speaker has certain influence to the Frequency Response of loud speaker, and ante-chamber influences high frequency, and back cavity influences low frequency.Cavity configuration has only a cavity before the mobile phone of introducing among U.S. Pat 5790679, US6002949, US7092745 and the US20050190941, utilize the resonance of aperture on ante-chamber and the front shroud, can strengthen the response of the some frequency ranges on the medium-high frequency, but the bandwidth of the frequency range that is strengthened is narrower.
Three, summary of the invention
The purpose of this invention is to provide a kind of device that improves outgoing loudspeaker responses, can promote the response of medium-high frequency better, and make the broader bandwidth of the frequency range that is strengthened.This device comprises a Microspeaker, is used for the electrical signal conversion of input is become corresponding acoustical signal; A back cavity is fixed on the back of the diaphragm of loudspeaker; An ante-chamber is fixed on the front of the diaphragm of loudspeaker; This ante-chamber is divided into the first and second sub-cavitys by first dividing plate, bores a hole on first dividing plate and second partition, by perforate on the second partition and outer boundary region coupling.
Four, description of drawings
Fig. 1 is the device schematic diagram that uses in the existing terminal equipment;
Fig. 2 is the schematic diagram of a kind of citation form of the present invention, comprises a Microspeaker, a back cavity, and an ante-chamber, wherein ante-chamber is divided into the first and second sub-cavitys by first dividing plate, bores a hole on first dividing plate and the second partition;
Fig. 3 is the acoustic analog line map of the preceding cavity configuration correspondence among Fig. 2;
Fig. 4 is that the loud speaker frequency response curve of the present invention and prior art compares.
Five, embodiment
The present invention is described in detail with reference to accompanying drawing below in conjunction with embodiment:
Fig. 2 is the embodiment schematic diagram that a loud speaker is put device outward.Wherein, this device comprises a housing 200, and including a Microspeaker 201 can become corresponding acoustical signal with the electrical signal conversion of input.In one embodiment, form the first sub-cavity 210 between the vibrating diaphragm front of loud speaker 201 and first dividing plate 211, on first dividing plate 211, perforate 212 is arranged.In one embodiment, form the second sub-cavity 220 between first dividing plate 211 and the second partition 221, perforate 222 is arranged on second partition 221.In one embodiment, the vibrating diaphragm back of loud speaker 201 and housing 200 form back cavity 230.
Fig. 3 is the acoustic analog line map of the preceding cavity configuration correspondence among Fig. 2.Wherein, first sub-cavity 210 equivalences become an acoustic capacitance element, and component value is C Af1Perforate 212 equivalences on first dividing plate 211 become the combination of acoustic resistance harmony mass elements, and its component value is respectively R Ao1And M Ao1Second sub-cavity 220 equivalences become an acoustic capacitance element, and component value is C Af2Perforate 222 equivalences on the second partition 221 become the combination of acoustic resistance harmony mass elements, and its component value is respectively R Ao2And M Ao2More than the computing formula of various component values can be with reference to the document and the technical manual of public publication.
The physical dimension of a preferred embodiment of the present invention is: the volume of the first sub-cavity 210 is 0.20 cubic centimetre; Open 1 hole on first dividing plate 211, the radius in hole is 0.5 millimeter, and length is 1 millimeter; The volume of the second sub-cavity 220 is 0.40 cubic centimetre; Open 2 holes on the second partition 221, the radius in each hole is 0.5 millimeter, and length is 1 millimeter; The volume of back cavity 230 is 50 cubic centimetres.
As a comparison, the physical dimension of a kind of embodiment of prior art is: the volume of ante-chamber 110 is 0.60 cubic centimetre; Open 2 holes on the preceding dividing plate 111, the radius in each hole is 0.5 millimeter, and length is 1 millimeter; The volume of back cavity 120 is 50 cubic centimetres.
Fig. 4 is that the loud speaker frequency response curve of a kind of embodiment of a preferred embodiment of the present invention and prior art compares.As can be seen, a resonance peak appears in prior art near 2.5kHz, responds to reduce rapidly after 2.5kHz, and the bandwidth of the frequency range that is strengthened is narrower; Though and the present invention slightly reduces to the response of 1.5kHz at 400Hz, but a resonance peak appears respectively near 2.5kHz and 4kHz, guarantee that like this response from 2kHz to 4kHz can both increase, the problem that reduces rapidly in the later response of first resonance peak, the broader bandwidth of the frequency range that is strengthened have been avoided.
By changing the physical dimension of embodiment, comprise the number of perforate on the radius of the number of perforate on the volume, first dividing plate 211 of volume, the second sub-cavity 220 of the first sub-cavity 210 and perforate and the second partition 221 and the radius of perforate, can control the position and the height of two resonance peaks, thereby reach the purpose that strengthens some special frequency channel response of medium-high frequency.
More than be the description to one particular embodiment of the present invention, the description that can be understood as for embodiment only is a kind of example.Correspondingly, the invention is not restricted to the above embodiment.Certainly, scope of the present invention described here only limits to the described scope of claims relevant with above-mentioned explanation and description taken together with the accompanying drawings.

Claims (2)

1. the device of the medium-high frequency response of an outgoing loudspeaker that is used to improve terminal such as mobile phone comprises:
A Microspeaker is used for the electrical signal conversion of input is become corresponding acoustical signal;
A back cavity is fixed on the back of the diaphragm of loudspeaker;
An ante-chamber is fixed on the front of the diaphragm of loudspeaker.
2. the ante-chamber of claim 1 is divided into the first and second sub-cavitys by first dividing plate, bores a hole on first dividing plate and the second partition, by perforate on the second partition and outer boundary region coupling.
CN 200910234220 2009-11-17 2009-11-17 Device for improving outgoing loudspeaker responses CN101711005B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 200910234220 CN101711005B (en) 2009-11-17 2009-11-17 Device for improving outgoing loudspeaker responses

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 200910234220 CN101711005B (en) 2009-11-17 2009-11-17 Device for improving outgoing loudspeaker responses

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CN101711005A true CN101711005A (en) 2010-05-19
CN101711005B CN101711005B (en) 2013-04-24

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102056047A (en) * 2010-12-14 2011-05-11 南京大学 Large-radiation angle six to nine-sound source speaker array
CN102395088A (en) * 2011-08-30 2012-03-28 瑞声声学科技(深圳)有限公司 Sounding device
CN103052009A (en) * 2012-12-25 2013-04-17 苏州恒听电子有限公司 Sounding unit for eliminating gear sound influence
WO2016124041A1 (en) * 2015-02-03 2016-08-11 歌尔声学股份有限公司 Speaker module
CN105872919A (en) * 2016-03-08 2016-08-17 上海安费诺永亿通讯电子有限公司 Loudspeaker module
CN106454655A (en) * 2016-09-30 2017-02-22 常州阿木奇声学科技有限公司 Loudspeaker and voice coil thereof
CN109600702A (en) * 2017-09-30 2019-04-09 西门子瑞士有限公司 Audible alarm unit

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3588355A (en) * 1968-07-26 1971-06-28 James P Holm Stereophonic loudspeaker system
US4079213A (en) * 1977-04-21 1978-03-14 Essex Group, Inc. Piezoelectric transducer having improved low frequency response
US4549631A (en) * 1983-10-24 1985-10-29 Bose Corporation Multiple porting loudspeaker systems
US5025885A (en) * 1989-07-14 1991-06-25 Bose Corporation Multiple chamber loudspeaker system
US5092424A (en) * 1990-12-03 1992-03-03 Bose Corporation Electroacoustical transducing with at least three cascaded subchambers
US5471019A (en) * 1994-12-29 1995-11-28 Sounds Resources, Inc. Multiple chamber loudspeaker system
CN1863413A (en) * 2005-05-12 2006-11-15 光宝科技股份有限公司 Loudspeaker structure

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102056047A (en) * 2010-12-14 2011-05-11 南京大学 Large-radiation angle six to nine-sound source speaker array
CN102056047B (en) * 2010-12-14 2013-06-05 南京大学 Large-radiation angle six to nine-sound source speaker array
CN102395088A (en) * 2011-08-30 2012-03-28 瑞声声学科技(深圳)有限公司 Sounding device
CN102395088B (en) * 2011-08-30 2014-06-04 瑞声声学科技(深圳)有限公司 Sounding device
CN103052009A (en) * 2012-12-25 2013-04-17 苏州恒听电子有限公司 Sounding unit for eliminating gear sound influence
CN103052009B (en) * 2012-12-25 2016-08-31 苏州恒听电子有限公司 A kind of phonation unit eliminating gear sound influence
WO2016124041A1 (en) * 2015-02-03 2016-08-11 歌尔声学股份有限公司 Speaker module
US10178467B2 (en) 2015-02-03 2019-01-08 Goertek Inc. Thin speaker module with a front acoustic cavity
CN105872919A (en) * 2016-03-08 2016-08-17 上海安费诺永亿通讯电子有限公司 Loudspeaker module
CN105872919B (en) * 2016-03-08 2017-04-05 上海安费诺永亿通讯电子有限公司 A kind of speaker module
CN106454655A (en) * 2016-09-30 2017-02-22 常州阿木奇声学科技有限公司 Loudspeaker and voice coil thereof
CN109600702A (en) * 2017-09-30 2019-04-09 西门子瑞士有限公司 Audible alarm unit

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