The currently popular speaker air tightness tester on the market is mainly the air tightness tester of Shenzhen Hirays Automation Technology. This air tightness test uses the compressed air detection method. The amount of air leakage of the speaker is calculated through the attenuation of air pressure, thereby determining the air tightness and IP waterproof level of the speaker.

The speaker air tightness test is suitable for air tightness testing of all audio equipment on the market.Waterproof grade identification and testing.Such as JBL's speaker air tightness test, Beijing Hyundai's speaker waterproof level test, etc.Whether it is a large or small, wired, wireless or Bluetooth speaker, you can use an air tightness tester to test the waterproof level and air tightness performance.

How the Hirays Air Tightness Tester tests speakers mainly depends on the structure of the product being tested. Some speakers have air vents, such as JBL's and Beijing Hyundai's. As long as they are slightly larger, air vents are usually reserved. For this type of product testing, there is no need for additional air tightness testing tooling. As long as the air tightness test quick interface is used to connect the air vents of the product, the test can be performed.If there is no inflation port, you need to make a sealing tool according to the shape of the product, then put the product into the test tool, connect it to the air tightness tester, and you can test it.Hirays' speaker air tightness tester integrates a positive and negative pressure test system. It can use negative pressure or positive pressure to test the waterproof level of the speaker. It is more applicable. Facing different test conditions, you can choose the most efficient air tightness and waterproof level testing solution. The following example picture shows JBL series products, whose protection level is IPX7. Some standards correspond to the laboratory standards: 1 meter underwater, half an hour, no water ingress.

Because we use gas as the medium for detection, the water molecules must be larger than the gas molecules, and we cannot detect for half an hour (inefficient), so we use a detection pressure of 10KPA (completely simulates underwater pressure) to form a pressure around the product through the mold, which is also the direction of completely simulated water pressure.

It can be clearly seen from the product tooling that the audio product testing is to put the whole machine into a sealed mold, and then add equal amounts of pressure through the instrument. After the pressure is stabilized, the instrument analyzes and calculates the specific pressure drop, so as to determine whether the product can meet its corresponding IP protection level.

Testing difficulties:

These products have common characteristics:

1. There is no inflation hole, there is a passive radiator, there is a speaker membrane, and some products also have waterproof and breathable membranes, so the pressure resistance is limited. In other words, the instrument range selection and the instrument output pressure must be accurate. If you are not careful, the product may be crushed, resulting in damage to the product.

2. The deformation of the product is large and irregular. When the detection pressure is fixed and the volume changes, the corresponding test results will also appear crossed and inaccurate.

How Haireisi solves similar problems:

1. To ensure the accuracy of the instrument, the sensor of Hirays' precision leak detection system adopts genuine American Honeywell quality, and after secondary development, the sampling speed can reach 114 times per second.

2. Hai Ruisi's precision leak detection system has achieved 24-bit AD conversion, and its 32-bit CPU has reached international first-class computing and processing.

3. The test accuracy reaches 1PA, and even small leaks can be easily detected.

4. The test mold is excellent and completely imitates the shape of the product with positive tolerance amplification. The smaller the excess space between the mold and the product, the more conducive to improving the detection accuracy.