With the progress of society, audio continues to improve and improve in line with people's needs, ranging from meeting the needs of live sound reinforcement for tens of thousands of people at concerts to meeting the needs of individual families to play musical instruments and sing karaoke. The use of audio is indispensable.As a playback device, people have extremely high requirements for air tightness of speakers.If its sealing is not good, it is easy to distort the sound quality during use, or even the sound will be scrapped, causing danger.
Therefore, manufacturers will conduct sealing testing on speakers before leaving the factory. There are various methods for sealing testing of speakers. This time, Hirays Technology will share a sealing testing case of speakers with everyone, hoping it will be helpful to you.
Audio dual-station sealing tester
1. Audio appearance display and analysis of detection difficulties
1. This speaker is a common style on the market. It has an irregular shape with several concave closed sound outlets. In the middle of the speaker is a switch area composed of several twists. The outside is wrapped with black waterproof shell material;
2. The special structure of the speaker makes it difficult to detect its sealing. In the early design and production process, its shell will be specially treated. Moreover, the speaker has many closed sound holes, so it cannot be directly inspected during inspection;
2. Breakthrough in difficult points of audio sealing testing and demonstration of the testing process
1. Regarding the special appearance of the speaker, Hirays Technology has a specially customized tooling mold for the speaker. Since this speaker has strong sealing properties, you only need to put it into the mold when starting the test. The groove inside the mold is customized according to the volume of the speaker. When it is put in, it will lock just right. In this way, during the test, the upper and lower parts of the mold will be closed to form a closed space;
Audio sealing test tooling details
2. Due to the large size of the speaker, this test uses a sealing tester that integrates the tooling and detector. This instrument tooling can support dual-channel simultaneous testing. There is only one speaker for this test, and only one of the channels needs to be used.
Audio sealing testing process demonstration
3. When the instrument is started, the instrument will inflate the airtight mold through the upper device. At the same time, the air pressure of the instrument will slowly rise. When the air pressure reaches the set value, the inside of the speaker will be in a constant state. At this time, the induction line will determine the flow value to detect whether the flow rate of the exhaust pipe meets the standard.
Audio sealing testing process demonstration
3. Audio sealing tester parameter table
1. High flexibility, functions can be added or deleted according to needs.
2. It has strong scalability and can quickly form multi-channel tests, greatly shortening the automated development cycle.
3. The analysis control system can use various methods such as industrial control computers plus control cards or embedded systems to facilitate the docking and implementation of the MES system.
4. The screen size supports customization. The embedded system comes standard with 7" and can be customized with 10.4", 12" and 15"; the screen size of the industrial control computer is not limited.
5. The standard configuration adopts the Hiraysi full-function valve island, with two pressure forms, positive and negative, and 8 test methods; the two pressure forms and five test methods can be programmed into more than 20 test functions.
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