Micro-sound detection analysis device and array audio signal processing method based on same

A technology for analyzing devices and audio signals, which is applied in measurement devices, beacon systems using ultrasonic/sonic/infrasonic waves, and speech analysis, etc., and can solve the problems of sound source identification and localization, and the lower limit of sound intensity detection of capacitive micro-acoustic detectors. , to achieve the effect of low sound intensity detection lower limit

Inactive Publication Date: 2016-12-21
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problem that the lower limit of sound intensity detection of the existing capacitive micro-acoustic detector is relatively high, the present invention proposes a micro-acoustic detection analysis device; in order to solve the problem that the micro-acoustic detector cannot simultaneously detect For the problem of identifying and locating the detected sound source, an array audio signal processing method is proposed

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  • Micro-sound detection analysis device and array audio signal processing method based on same
  • Micro-sound detection analysis device and array audio signal processing method based on same
  • Micro-sound detection analysis device and array audio signal processing method based on same

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Embodiment 1

[0051] Embodiment one: combine below figure 1 To describe this embodiment in detail, a micro-acoustic detection and analysis device described in this embodiment includes a micro-acoustic sensing array 1, a signal processing unit 2, a signal storage unit 3, and a signal analysis unit 4;

[0052] The microacoustic sensor array 1 includes a plurality of microacoustic sensors;

[0053] The microacoustic sensor is used to convert the sound signal into an electrical signal, and send the electrical signal to the signal processing unit 2;

[0054] The microacoustic sensor includes a microacoustic sensing unit, and the microacoustic sensing unit includes a graphene film, and the graphene film is used to sense sound pressure;

[0055] The signal processing unit 2 is used to process the electrical signal sent by the micro-acoustic sensor, and send the electrical signal including audio feature information and sound source position information to the signal analysis unit 4;

[0056] The ...

Embodiment 2

[0059] Embodiment two: combine below figure 2 Describe this embodiment in detail. This embodiment is to further limit the micro-acoustic detection and analysis device described in Embodiment 1. In the micro-acoustic detection and analysis device described in this embodiment, the micro-acoustic sensor is also Including a laser 5 and a photosensitive element 6;

[0060] The micro-acoustic sensing unit also includes a substrate 7, the substrate is provided with a through hole, the graphene film 8 is fixedly arranged on the substrate 7, and covers one end of the through hole;

[0061] The laser light emitted by the laser 5 is incident on the graphene film 8 through the other end of the through hole, and is incident on the photosensitive surface of the photosensitive element 6 through the refraction of the graphene film 8;

[0062] The photosensitive element 6 is connected with the signal processing unit 2 .

[0063] When the graphene film is not subjected to sound pressure and ...

Embodiment 3

[0064] Embodiment three: the following combination image 3 Describe this embodiment in detail. This embodiment is to further limit the micro-acoustic detection and analysis device described in Embodiment 1. In the micro-acoustic detection and analysis device described in this embodiment, the micro-acoustic sensor is also Including a first permanent magnet 9 and a second permanent magnet 10;

[0065] The micro-acoustic sensing unit also includes a substrate 7, the substrate is provided with a through hole 11, the graphene film 8 is fixedly arranged on the substrate 7, and covers one end of the through hole 11;

[0066] Both the first permanent magnet 9 and the second permanent magnet 10 are arranged on the substrate 7, and a coupling magnetic field is formed between the first permanent magnet 9 and the second permanent magnet 10;

[0067] When the graphene film 8 is vibrated by sound pressure, it can cut the magnetic field and generate an electrical signal;

[0068] The sign...

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Abstract

The invention discloses a micro-sound detection analysis device and an array audio signal processing method based on the same, belongs to the field of micro-sound detection, and solves problems that a conventional capacitive-type micro-sound detector is higher in lower limit of the sound intensity detection, and the recognition and positioning of a sound source detected by the micro-sound detector cannot be carries out at the same time based on a conventional audio signal processing method. The device employs a micro-sound sensing unit based on a graphene film to sense sound pressure. The method comprises the steps: separating noise signal in an audio signal, extracting the audio feature information and sound source position information in the audio signal, comparing the audio signal comprising the audio feature information and sound source position information with a plurality of target sound sources stored in the signal storage unit, judging whether there is a matched target source or not, and carrying the positioning of the sound source according to the sound source position information. The device is suitable for the micro-sound detection and the recognition and positioning of the detected sound source.

Description

technical field [0001] The invention relates to the field of micro-acoustic detection, in particular to a micro-acoustic detection and analysis device and an array audio signal processing method based on the device. Background technique [0002] Microacoustic detectors are widely used in national defense and civilian fields. In recent years, the application fields of micro-acoustic detectors have higher and higher requirements for the detection limit of sound intensity of micro-acoustic detectors. However, the existing capacitive micro-acoustic detector has a relatively high sound intensity detection limit, which cannot meet the requirements of its application field for the sound intensity detection limit. [0003] In addition, according to the existing audio signal processing method, the micro-acoustic detector cannot identify and locate the detected sound source at the same time. Contents of the invention [0004] In order to solve the problem that the lower limit of s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01H9/00G01H11/02G01H11/06G01S1/76
CPCG01H11/02H04R9/08H04R19/04H04R23/008H04R23/02H04R29/00H04R2307/023G10L25/51
Inventor 杨霖张健伟侯成宇曹国剑
Owner HARBIN INST OF TECH
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