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Demonstration of the example of using airtightness tester to detect sound

With the progress of society, the sound system is constantly improved and perfected with the needs of people. It is necessary to meet the needs of tens of thousands of people's live sound reinforcement in concerts, and to meet the needs of individual families playing musical instruments and karaoke songs. As a broadcasting equipment, the air tightness of audio is very high. If its sealing is not good, it is easy to make the sound quality distortion in the process of using, and even the sound is scrapped, leading to the occurrence of danger.

Therefore, manufacturers will test the sealing of the sound before leaving the factory. There are various methods for testing the sealing of the sound. This time, Harris technology will share a case of the sealing test of the sound to you, hoping to help you.

Double position sealing tester for sound

1、 Analysis on the difficulties of sound appearance display and detection

1. This stereo is a common style on the market. It has several concave closed outlets in the irregular shape. In the middle of the stereo is a switch area composed of several twists, and the outside is wrapped with black waterproof shell material;

2. The special structure of the sound system makes it difficult to test its sealing performance. In the early design and production process, the shell of the sound system will be treated specially, and the sound system has many closed sound producing holes, so it is impossible to test it directly;

2、 Breakthrough of acoustic tightness testing difficulties and demonstration of testing process

1. For the special shape of the sound, Harris technology has a customized tooling mold for the sound. Because of the strong sealing of the sound, when testing, just put it into the mold. The groove inside the mold is customized according to the volume of the sound, and it is just right when it is put in and out. In this way, the mold will be closed up and down during testing, Form a closed space;

Details of the tooling for sound tightness test

2. Due to the large volume of the sound, this test uses the sealing detector which integrates the tooling and the detector. The tooling of this instrument can support the simultaneous detection of two channels. There is only one sound for this test, and only one channel is needed.

Demonstration of sound sealing test process

3. When the instrument is started, the instrument will inflate into the closed mold through the upper appliance, and the air pressure of the instrument will rise slowly. When the air pressure is charged to the set value, the interior of the sound will be in a constant state. At this time, the induction line will determine the flow value to detect whether the flow of the exhaust pipe meets the standard.

Demonstration of sound sealing test process

3、 Parameter table of sound tightness tester

1. High flexibility, the function can be added or deleted according to the demand.

2. It has strong expansibility and can quickly form multi-channel test, which greatly shortens the development cycle of automation.

3. The analysis and control system can use industrial control computer plus control card or embedded system to facilitate the docking and implementation of MES system.

4. The screen size supports customization, and the embedded system is equipped with 7 "customizable 10.4" 12 "15" as standard; Industrial computer mode, screen size is not limited.

5. The standard configuration adopts Harris full function valve island, positive and negative pressure forms and 8 test methods; Two pressure forms and five test methods can be written into more than 20 test functions,

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