This Application claims priority of Taiwan Patent Application No. 097139491, filed on Oct. 15, 2008, the entirety of which is incorporated by reference herein.
1. Field of the Invention
The invention relates to an electro-acoustic transducer, and more particularly, to an electro-acoustic transducer characterized by an increased volume output and extension of low frequencies.
2. Description of the Related Art
A dividing material of an electro-acoustic transducer is utilized to separate an electret diaphragm and an orifice plate thereof in order to maintain a vibrating space therebetween. When charged with electricity, the electret diaphragm is able to vibrate according to an input signal.
The invention discloses an electro-acoustic transducer. The electro-acoustic transducer includes an electret diaphragm, an orifice plate and a plurality of dividing structures. The dividing structures, disposed between the electret diaphragm and the orifice plate, are cross-shaped. Each of the dividing structure includes two extending portions intersecting with each other.
A detailed description is given in the following embodiments with reference to the accompanying drawings.
The invention can be more fully understood by reading the subsequent detailed description and examples with references made to the accompanying drawings, wherein:
Referring to
Referring to
In addition, the extending portions 131, 132 respectively have a width W (as shown in
In a real measurement, if the size and distance (1 mm) between two dividing structures (dividing materials) are the same, the volume output of the electro-acoustic transducer of the embodiment would be increased by 6 dB compared with the conventional electro-acoustic transducer.
Because the dividing structures of the electro-acoustic transducer of the embodiment are cross-shaped, the contact area between the electret diaphragm and the dividing structures is reduced, thereby increasing an effective vibrating area. Moreover, the sensitivity of the electret diaphragm is increased by 40%, and the low frequency is further extended.
While the invention has been described by way of example and in terms of preferred embodiment, it is to be understood that the invention is not limited thereto. To the contrary, it is intended to cover various modifications and similar arrangements (as would be apparent to those skilled in the art). Therefore, the scope of the appended claims should be accorded the broadest interpretation so as to encompass all such modifications and similar arrangements.
Number | Date | Country | Kind |
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97139491 A | Oct 2008 | TW | national |
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Number | Date | Country |
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Number | Date | Country | |
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20100092012 A1 | Apr 2010 | US |