Open earphone
US-2024422466-A1 · Dec 19, 2024 · US
Microphone
US8995701B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8995701-B2 |
| Application number | US-201113191944-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 27, 2011 |
| Priority date | Jul 30, 2010 |
| Publication date | Mar 31, 2015 |
| Grant date | Mar 31, 2015 |
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- Title
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Abstract
Official abstract text for this publication.
An electroacoustic transducer includes a diaphragm, an electroacoustic transducer unit having the diaphragm, and an air chamber having the diaphragm of the electroacoustic transducer unit and having a variable volume in response to vibration of the diaphragm. The air chamber has a sound pressure detector detecting a sound pressure in the air chamber and a volume adjuster driven by the output signals from the sound pressure detector, changing the volume of the air chamber in response to the output signals, and controlling the acoustic impedance of the air chamber. A control system from the sound pressure detector to the volume adjuster configures a feedback control system increasing the volume of the air chamber with an increase in the sound pressure in the air chamber.
First claim
Opening claim text (preview).
What is claimed is: 1. A microphone comprising: a microphone unit comprising a first diaphragm vibrating in response to sound waves from a sound source; an air chamber having a variable volume in response to vibration of the first diaphragm; a sound pressure detector detecting a sound pressure in the air chamber; and a volume adjuster, having a second diaphragm forming one side of the air chamber, driven by output signals from the sound pressure detector, changing the volume…
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Frequently asked questions
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- What does patent US8995701B2 cover?
- An electroacoustic transducer includes a diaphragm, an electroacoustic transducer unit having the diaphragm, and an air chamber having the diaphragm of the electroacoustic transducer unit and having a variable volume in response to vibration of the diaphragm. The air chamber has a sound pressure detector detecting a sound pressure in the air chamber and a volume adjuster driven by the output si…
- Who is the assignee on this patent?
- Akino Hiroshi, Audio Technica Kk
- What technology area does this patent fall under?
- Primary CPC classification H04R3/04. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Mar 31 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).