Title:
AN ACOUSTIC STRUCTURE USING A PASSIVE DIAPHRAGM UNIT
Document Type and Number:
WIPO Patent Application WO/2017/199176
Kind Code:
A1
Abstract:
The present invention provides an acoustic structure with a passive diaphragm unit comprising: a housing, a speaker unit and at least one passive diaphragm unit. The housing as mentioned above has a closely connected aperture with the speaker unit and the passive diaphragm unit, the passive diaphragm unit as stated above and the cavity inside the housing form an air spring, whose resonant frequency is lower than the resonant frequency of the loudspeaker unit. The cavity in the mentioned housing constitutes the cavity of the speaker unit and the passive diaphragm unit. The ratio of the effective resonant area of the passive diaphragm unit to the effective cone area of the loudspeaker unit is greater than or equal to 3. The present invention provides an acoustic structure using a passive diaphragm unit, such that the passive diaphragm unit forms an independent low-frequency radiation source, thereby expanding the low-frequency response range of the loudspeaker unit through the passive diaphragm unit so that the sensitivity of the entire acoustic structure in the low-frequency range can be greatly enhanced.
Inventors:
LI SHIHUANG (SG)
Application Number:
PCT/IB2017/052902
Publication Date:
November 23, 2017
Filing Date:
May 17, 2017
Export Citation:
Assignee:
TGI TECH PTE LTD (SG)
International Classes:
H04R1/02; H04R7/02
Domestic Patent References:
| WO2013100862A2 | 2013-07-04 | |||
| WO2013100863A2 | 2013-07-04 |
Foreign References:
| US20120014542A1 | 2012-01-19 | |||
| US20160094917A1 | 2016-03-31 | |||
| US20050271226A1 | 2005-12-08 |
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