Title: Meter and measurement of harmonic distortion under great power of louderspeaker
Application Number: 85100620 Application Date: 1985.04.01
Publication Number: 1000330 Publication Date: 1986.02.10
Approval Pub. Date: Granted Pub. Date: 1990.06.13
International Classifi-cation: G01H3/00,G01H13/00,H04R29/00
Applicant(s) Name: No. 3 Inst., Ministry of Electronics Industry Address:
Inventor(s) Name:
Attorney & Agent: ZHANG XIANGUANG
Abstract:
     The measurment is aimed at measuring harmonic distortion under great power of speakers. In a common room the parameters such as frequency response, sensibility of spearer. radio, TV. recorder and hall acoustic devices can be measured. The results are as accurate as those in a muffled room. By the invention a large funds for building muffled room can be saved. The meter is mainly characterised by its signal proccessing system with A/D-microcomputer-D/A, in which the design of hardware and software has originality.
Time: 12
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