Check patentability & draft patents in minutes with Patsnap Eureka AI!

Device and method for online calibrating sensitivity of phonoscope

A microphone and sensitivity technology, applied in the field of sensor testing, can solve the problems of cumbersome measurement methods, large volume, and complex structure, and achieve the effects of miniaturization, small volume, and accuracy assurance

Inactive Publication Date: 2011-05-25
SOUTHWEAT UNIV OF SCI & TECH +1
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the use of gas such as dry air to prevent the gas to be measured from directly contacting the sound receiving end of the microphone, the gas such as dry air must be carried during the measurement, and the flow is controlled by a capillary and a pressure control valve, so that this method of eliminating the influence of the sensitivity of the microphone The measurement method is too cumbersome, the structure is too complicated, the volume is too large, and there are many inconveniences in field application

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Device and method for online calibrating sensitivity of phonoscope
  • Device and method for online calibrating sensitivity of phonoscope
  • Device and method for online calibrating sensitivity of phonoscope

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] All features disclosed in this specification, or steps in all methods or processes disclosed, may be combined in any manner, except for mutually exclusive features and / or steps.

[0035] Any feature disclosed in this specification (including any appended claims, abstract and drawings), unless expressly stated otherwise, may be replaced by alternative features which are equivalent or serve a similar purpose. That is, unless expressly stated otherwise, each feature is one example only of a series of equivalent or similar features.

[0036] like figure 1 As shown, a device for on-line calibration of the sensitivity of a microphone includes a light source 1 and a photoacoustic cavity 3, a collimator 2 is arranged between the light source 1 and the photoacoustic cavity 3, the light source 1 is connected to the drive control circuit 6 through a transmission line, and the microphone 4 is set in the photoacoustic cavity 3, the microphone 4 is connected to the signal processing...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a device and a method for online proving of the sensitivity of a phonoscope. A standard sound source is used for issuing acoustic signals with a certain frequency and a predetermined intensity; the signals are sent to a signal detection circuit after being received by the phonoscope; the detected signal intensity is used as the characteristics of the sensitivity of the phonoscope; the variation of the signal intensity represents the variation of the sensitivity of the phonoscope; and the signals obtained by measuring the phonoscope during normal operation is compared with the signal intensity obtained by measuring the phonoscope so as to obtain the actual signal intensity without the influence of the sensitivity of the phonoscope. The invention has the advantages that the influence on the sensitivity of the phonoscope by the environmental factors of gas humidity, content, temperature, solid particle gathering, and the like is fully considered, and the accuracy in the process of measuring the phonoscope is ensured, thereby the value for accurately reflecting the intensity of the acoustic signals is obtained, and accurate, reliable and valid data are providedfor the system constituted by the phonoscope.

Description

technical field [0001] The invention relates to the technical field of sensor testing, in particular to a device and method for on-line calibration of the sensitivity of a microphone. Background technique [0002] Microphone is a kind of sound-to-electricity conversion device, and the electric signal changes with the change of sound wave. According to the principle of energy conversion, microphones can be divided into electric, capacitive, piezoelectric, electromagnetic, carbon particle, semiconductor and silicon microphones, in addition to liquid microphones, laser microphones, etc. [0003] Electret Condenser Microphone, referred to as ECM, is to accumulate charges on the polymer film, making it a semi-permanent or temporary electrode permanent charged body. It consists of two parts: acoustic-electric conversion and impedance conversion. The vibrating plate is made by combining PET film and metal conductive ring, and the middle is separated by a ring-shaped plastic insul...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/00
Inventor 刘先勇乐莉王寿全彭琛余玉江袁长迎胡文郭锋
Owner SOUTHWEAT UNIV OF SCI & TECH
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com