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Pickup sensor and bone conduction speaker

A sensor and metal plate technology, applied in the direction of sensors, bone conduction transducers, hearing equipment, sensor parts, etc., can solve the problem that the weight of the sensor part is less than 1g, and achieve good sensitivity

Pending Publication Date: 2022-03-29
BOSTOCK +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the usual sensor part has a structure in which a sheet-shaped piezoelectric element is sandwiched between electrodes, and the weight of the sensor part is generally less than 1g.
[0005] However, such a conventional sound pickup sensor is easily affected by the vibration of the surrounding air while detecting the vibration as the measurement object.
For example, if it is intended to be used in a place with a lot of noise, the vibration of the structure to be measured will be detected as well as air vibration (noise), so accurate measurement may not be possible.

Method used

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  • Pickup sensor and bone conduction speaker
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  • Pickup sensor and bone conduction speaker

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0079] The sensitivity of the existing pick-up sensor and the pick-up sensor of the present invention is compared. Figure 9 is a schematic diagram showing the evaluation device 60 . The sound pickup sensor 100 and the sound pickup sensor 1 are arranged on a vibrating body excited by the vibrator 63 , and the detected waveform is confirmed by the analyzer 61 .

[0080] The vibrator 63 changes the vibration at 20 to 20 kHz. The sound pickup sensor 100 has a structure that does not have a second metal plate with respect to the sound pickup sensor 1 , and a bone conduction speaker having a structure roughly described in Patent Document 2 is used as a sound pickup sensor.

[0081] As a result, the sound pressure detected by the pickup sensor 1 is about 30% higher than that of the pickup sensor 100 .

[0082] Similarly, the exciter 63 was stopped, the sound pickup sensor 1, 100 was made to function as a bone conduction speaker, and the vibration was measured by the piezoelectric ...

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PUM

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Abstract

A diaphragm (15) is disposed above the yoke (3). A recess (19) is formed in the upper surface of the vibrating membrane (15). A first metal plate (17) is disposed in the recess (19). A permanent magnet (23) is disposed substantially above the center of the first metal plate (17). A second metal plate (25) is disposed above the permanent magnet (23). In addition, the first metal plate (17) and the second metal plate (25) are larger in size than the permanent magnet (23). That is, with respect to the permanent magnet (23), the first metal plate (17) and the second metal plate (25) are disposed so as to protrude further than the permanent magnet (23) in the longitudinal direction.

Description

technical field [0001] The present invention relates to a sound pickup sensor and a bone conduction speaker capable of efficiently detecting vibrations. Background technique [0002] Conventionally, a pickup sensor has been used to measure the vibration of a certain structure. There are various types of pickup sensors, but acceleration sensors using piezoelectric elements (Piezo elements) with good sensitivity are widely used. [0003] As such an acceleration sensor, for example, there is proposed an acceleration sensor having a sensor part having a sensor element for detecting acceleration and a flexible part for fixing the sensor element, and a circuit board which processes an output signal of the sensor element, and a circuit board for the sensor part It is stacked and arranged separately from the circuit board (for example, Patent Document 1). [0004] In addition, this type of acceleration sensor has extremely high sensitivity in order to detect microvibrations. For ...

Claims

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Application Information

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IPC IPC(8): H04R9/02H04R9/06H04R9/08
CPCH04R9/027H04R9/06H04R9/08H04R2460/13H04R1/04H04R1/1083H04R2410/03H04R13/00G10K11/17823G10K11/17881G10K2210/1081H04R1/00H04R9/02H04R11/00H04R1/1091H04R7/02H04R9/046
Inventor 中谷任徳谢端明
Owner BOSTOCK