Comprehensive sound characteristic experimental instrument

A technology of sound characteristics and experimental instruments, which is applied in the direction of instruments, teaching models, educational appliances, etc., can solve the problems of large volume of experimental instruments, large occupied area, single experimental method, etc., and achieve enhanced fun, high reliability, and convenient use Effect

Inactive Publication Date: 2011-01-26
STATE GRID CORP OF CHINA +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The commonly used experimental method for the demonstration of the standing wave phenomenon is carried out by mechanical and mechanical methods. The experimental equipment is large in size and troublesome to operate; the ultrasonic sound velocity measuring instrument is the most popular in domestic colleges and universities for the measurement of sound velocity, but the experiment must be equipped with oscilloscopes, Various instruments such as signal sources or computer virtual instruments have high experimental costs and occupy a large area, and are not intuitive in terms of principles and experimental phenomena, and are not interesting, and they all measure the speed of sound under normal pressure and normal temperature conditions, so other experiments cannot be done Content, single experimental method

Method used

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  • Comprehensive sound characteristic experimental instrument
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Embodiment Construction

[0011] figure 1 Among them, there are four supporting feet 1 of the base 2, which play the role of stabilizing the base 2, one of which is adjustable in height, the base 2 is a rectangular box, and various parts of the circuit of the host 22 are placed in it, and the base 2 is used as a chassis In use, each control knob (control potentiometer) and control switch and output socket in the main frame 22 are installed on the side of the base 2 as the instrument operation panel. Meter box 21 is fixed together with base 2, and audio frequency voltmeter 25, digital frequency meter 27, digital thermometer 23 are just installed on the meter box 21, are convenient to observe reading. The bracket 3 is fixed on the base 2, and the transparent round tube 18 made of hard plastic or glass is fixed on the bracket 3 (one on each side). The fixing method of the transparent round tube 18 can be bonded, or a metal ring can be added. Encircle the transparent round pipe 18, and then fix the fixed ...

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Abstract

The invention discloses a comprehensive sound characteristic experimental instrument, which is characterized in that a transparent circular tube is provided with electric heaters and a thermometer; one end of the transparent circular tube is provided with a speaker connected with an audio signal generator in the machine and the other end thereof can reflect sound waves, thus forming standing waves; the transparent circular tube is provided with a set of movable microphone combined devices; microphones are connected with a microphone signal amplifier; and the microphone signal amplifier is connected with an audio voltmeter. The experimental instrument can find the node positions of the standing waves rapidly and conveniently by changing the positions of the microphones, thus measuring the sound characteristics or demonstrating the standing waves. The experimental instrument can also display the frequency and strength of the environmental sound and can be used as the audio signal source. The experimental instrument overcomes the troubles that the existing sound velocity measuring instruments need to be equipped with signal sources and oscilloscopes externally and can not make experiments related to relation between the sound velocity and the temperature and air pressure, is low in cost, integrally designed and convenient and reliable to use, displays sound and light synchronously and can be used for sound velocity measuring experiments or physics demonstration experiments in colleges and universities.

Description

technical field [0001] The invention relates to a physical experiment instrument, in particular to a sound characteristic comprehensive experiment instrument for physical experiments. Background technique [0002] The measurement of the speed of sound and the demonstration of the standing wave phenomenon are two very important experimental items in physical experiments, and the experimental methods are various. The commonly used experimental method for the demonstration of the standing wave phenomenon is carried out by mechanical and mechanical methods. The experimental equipment is large in size and troublesome to operate; the ultrasonic sound velocity measuring instrument is the most popular in domestic colleges and universities for the measurement of sound velocity, but the experiment must be equipped with oscilloscopes, Various instruments such as signal sources or computer virtual instruments have high experimental costs and occupy a large area, and are not intuitive in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09B23/14
Inventor 赵杰
Owner STATE GRID CORP OF CHINA
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