What is the design scheme of ePTFE waterproof sound-permeable membrane for terminal equipment
What is the design scheme of ePTFE waterproof sound-permeable membrane for terminal equipment? Nowadays, the requirements and standards for some electronic terminal equipment products are getting higher and higher. Some terminal equipment such as walkie-talkies and GPS navigators sometimes have to be used outdoors in an environment with rain and water mist, or even under water. Let's find out with Goel editor.
ePTFE waterproof sound-permeable membrane
In order to prevent liquids such as water from entering the terminal equipment and affecting the work of the electronic equipment, a reasonable design scheme must be adopted to carry out a good airtight design.
If the airtight design was done in the past, the sound quality could not be considered, in other words, the breathability and sound quality could not be balanced. Now the technology is mature, and the sound transmission can be achieved through the waterproof sound-permeable membrane design scheme and ePTFE is waterproof and permeable. The sound film sound loss is reduced to a certain range.
In terminal products equipped with electro-acoustic devices such as waterproof microphones or receivers, the pressure builds up due to the heating of components in the acoustic cavity or the acoustic chamber, which affects the electro-acoustic devices such as microphones or receivers, resulting in input or output sound. The sound quality or tone is distorted or attenuated, which requires the ePTFE waterproof sound-permeable membrane material to have good waterproof performance. Therefore, the required waterproof and breathable membrane material can be used to solve this problem.
The ePTFE waterproof sound-permeable membrane design scheme uses dispersed PTFE resin as the raw material, and is stretched and expanded into a polytetrafluoroethylene membrane through some special processes. Free in and out of the device, sound can diffuse through small holes. At the same time, the micropores of the membrane used in the ePTFE waterproof sound-permeable membrane design scheme are smaller than water droplets and smaller than dust, so as to isolate water droplets and fine dust from the outside of electronic terminal equipment.
At the same time, the sound of the microphone in the electronic terminal equipment causes the vibration of the acoustic waterproof membrane, and the sound is transmitted to the outside of the device with the vibration of the membrane used in the design of the ePTFE waterproof sound-permeable membrane; the same external sound will also cause the terminal equipment ePTFE waterproof and permeable. The vibration of the acoustic membrane and the vibration of the membrane will also be sensed by the receiver, thereby converting the external sound into an electrical signal and transmitting it into the device.
The three-dimensional small pores of the ePTFE waterproof sound-permeable membrane design scheme of the terminal equipment can make the free movement of air molecules (Brownian motion) unaffected, so that the air pressure inside and outside the equipment can be dynamically balanced. The pressure difference generated by the dial change can eliminate the stress on electroacoustic devices such as microphones or receivers, and achieve high-fidelity transmission of sound. The sound loss and sound resistance of the waterproof sound-permeable membrane can be reduced to a certain range.