High-stability working standard microphone used in wide temperature range

Abstract

The invention discloses a high-stability working standard microphone used in a wide temperature range, which comprises a shell, a vibrating diaphragm, a rear polar plate, a protective cover, an insulator and a signal output mechanism, wherein the protective cover is mounted outside the shell, a cavity is formed in the shell, and the rear polar plate, the insulator and the signal output mechanism are all mounted in the cavity; the vibrating diaphragm is installed at the upper end of the shell, the rear polar plate is located below the vibrating diaphragm, an air gap is formed between the rear polar plate and the vibrating diaphragm, the vibrating diaphragm, the rear polar plate and the air gap form a capacitor, the insulator is connected with the rear polar plate, and the signal output mechanism is connected with the insulator. The upper ring, the nickel alloy vibrating diaphragm and the lower ring are welded into a whole in a laser welding mode, the overall high-temperature resistanceof the microphone is achieved, the use temperature range of the microphone is widened, the shell and the vibrating diaphragm are connected in an interference fit mode and are pressed together, and reliable connection of the microphone shell and the vibrating diaphragm is achieved.

Description

technical field [0001] The invention relates to the technical field of condenser microphones, in particular to a high-stability working standard microphone used in a wide temperature range. Background technique [0002] At present, environmental noise has become the fourth largest pollution after waste gas, waste water, and waste residue. As long as there is vibration, sound can be produced, machinery can produce sound, animals can produce sound, and cloud friction can produce thunder, so in life There are sounds in every environment in the environment, and some sounds may exist in the conventional environment, which is convenient for us to measure, but in some high temperature, high humidity or extremely cold environments, it is necessary to have a wider temperature range It can only be measured with a high-stability working standard microphone, and this microphone is designed to meet such demands. [0003] At present, there is a lack of high-temperature and high-temperatu...

AI Technical Summary

Problems solved by technology

[0005] The invention mainly solves the problems of poor diaphragm stability and narrow operating temperature range of the microphone in the prior art; it provides a high-stability working standard microphone used in a wide temperature range, and strengthens the connection stability between the microphone shell and the diaphragm, Expand the operating temperature range of the microphone and increase the service life of the microphone in harsh environments

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