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Device for improving outgoing loudspeaker responses

A loudspeaker and micro-speaker technology, applied in the direction of diaphragm structure, etc., can solve the problem of narrow frequency band and bandwidth

Inactive Publication Date: 2010-05-19
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The front chamber structure of the mobile phone introduced in U.S. Patents US5790679, US6002949, US7092745 and US20050190941 has only one cavity, and the resonance of the front cavity and the small hole on the front cover can be used to enhance the response of a certain frequency band on the middle and high frequencies, but the enhanced Bandwidth is narrow

Method used

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  • Device for improving outgoing loudspeaker responses
  • Device for improving outgoing loudspeaker responses
  • Device for improving outgoing loudspeaker responses

Examples

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Embodiment Construction

[0008] The present invention is described in detail below in conjunction with embodiment with reference to accompanying drawing:

[0009] figure 2 It is a schematic diagram of an embodiment of a loudspeaker loudspeaker. Wherein, the device includes a housing 200 containing a micro speaker 201 that can convert an input electrical signal into a corresponding acoustic signal. In one embodiment, a first subcavity 210 is formed between the front of the diaphragm of the loudspeaker 201 and the first partition 211 , and an opening 212 is formed on the first partition 211 . In one embodiment, a second subcavity 220 is formed between the first partition 211 and the second partition 221 , and an opening 222 is formed on the second partition 221 . In one embodiment, the back of the diaphragm of the speaker 201 and the casing 200 form a rear cavity 230 .

[0010] image 3 for figure 2 The acoustic analog circuit diagram corresponding to the front chamber structure in . Wherein, th...

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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 ofthe 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 thegeometric dimensions of the front cavity, thereby effectively enhancing the responses of the frequency range corresponding to the medium-high frequency.

Description

1. Technical field [0001] The invention relates to a device for improving the response of an external loudspeaker, in particular to a device for improving the mid-high frequency response of the external loudspeaker of a terminal such as a mobile phone. 2. Background technology [0002] At present, terminals such as mobile phones and MP3 players are more and more widely used, and people have higher and higher requirements for the external playback function of these terminals. The cavity structure attached to the speaker has a certain influence on the frequency response characteristics of the speaker, the front cavity affects the high frequency, and the rear cavity affects the low frequency. The front chamber structure of the mobile phone introduced in U.S. Patents US5790679, US6002949, US7092745 and US20050190941 has only one cavity, and the resonance of the front cavity and the small hole on the front cover can be used to enhance the response of a certain frequency band on t...

Claims

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Application Information

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IPC IPC(8): H04R7/02
Inventor 葛俊邱小军
Owner NANJING UNIV
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