As a playback device, people have extremely high requirements for air tightness of speakers.Air tightness testing of speakers can help prevent sound quality distortion or even scrapping of speakers.We have previously shared the air tightness testing cases of Hirays Technology for several different models of speakers. The speakers that need to be tested this time are different from the models shared in the past. This time we will introduce to you the multi-station customized air tightness tester of Hirays Technology. The following is a case study of the station air tightness testing of audio.

Audio dual-station air tightness tester

1. Audio appearance display and analysis of detection difficulties

1. This pair of speakers is a common style on the market. It is in the shape of a cylinder. The sound emission area on the front is concave in shape, and the middle is flush with the front of the speaker. In the middle of the speaker is a switch area composed of several twists. The outside is wrapped with black waterproof shell material;

Test cases

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. By observing the speaker, we can see that there are several small air outlets directly above the speaker. The concave circle in the sound outlet area is a layer of sound membrane, which can be pressed and fixed by the mold to fill the inside with gas;

Audio air tightness testing mold

Details of dual-station air tightness detection of audio equipment

2. According to the appearance of the speaker, Hirays Technology used a dual-station air tightness tester that integrates the tester and the tooling. The tooling has a mold specifically designed to hold the speaker. This mold is customized according to the area of ​​the speaker. It snaps just right after being put in. During the test, the upper mold is stuck above the speaker and inflates the inside of the speaker. In this way, the air tightness of the speaker can be judged by the air pressure inside the speaker;

Demonstration of the audio’s dual-station air tightness testing process

3. When the instrument is started, the instrument will inflate the inside of the speaker through the upper device, and the air pressure of the instrument will slowly rise. When the air pressure reaches the set value, the interior 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.

3. Parameter table of audio air tightness detector

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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