I. Overview of noise levels
The noise of the micro-air pump mainly comes from the sound generated by the high-speed flow of air in the pump chamber, rather than the sound generated by mechanical collision. Noise levels are usually measured in decibels (dB).
Second, the industry average noise level
For micro-air pumps with high vacuum pressure and large flow, such as TOPSFLO's TM40A-B model, the average noise in the domestic industry is generally recognized to be about 70dB. However, with the continuous advancement of technology and the intensification of market competition, the noise level of some high-end products has been significantly reduced.
Third, the specific product noise level
Taking the TM40A-B model of Dopole Pump industry as an example, the product can achieve a high vacuum pressure of 80KPA and a flow rate of 16L at the same time, the noise value can be lower than the industry average 10-15dB, and the load noise is as low as 55dB. This noise level is a leading position in the micro-pump industry and is widely used in areas with high noise requirements, such as electric nasal aspirators, medical and beauty equipment, laboratory equipment, etc.
4. Noise test method
The noise test method of the micro air pump may vary from manufacturer to manufacturer, but usually involves placing the micro pump on a certain thickness of foam, connecting the pump port to a certain length of hose, and then adjusting the pump speed to the lowest or highest speed, using a decibel meter to measure the noise value at a certain distance from the pump body. It is necessary to pay attention to the interference of environmental noise during testing to ensure the accuracy of measurement results.
5. Methods to reduce noise
In order to reduce the noise level of micro-air pumps, the following measures can be taken:
Optimize the pump chamber structure design to reduce turbulence and eddy currents in the pump chamber, thereby reducing noise.
Use noise reduction materials or techniques, such as adding a sound insulation layer to the pump housing or using a silencer.
The exhaust port or suction port of the micro air pump is connected with a longer pipeline, and the method of deliberately bending, winding, and repeatedly changing the diameter of the inner hole is used to change the flow state of the gas, so as to reduce the size and frequency of noise.