Test on acoustic resonance characteristic of PTFE micro-aperture membrane

The experimental study of sound transmission characteristics was carried out based on polytetrafluoroethylene(PTFE) micro-aperture membrane. The experimental result shows that: when there is no air cavity, it does not affect the sound transmission; when there is air cavity, it is resonant sound absorption, In the frequency range of 100 Hz~1500 Hz, it is low frequency high rate sound transmission zone. In the frequency range of 1500 Hz~6300Hz, it is high frequency resonant sound absorption zone. So the PTFE micro-aperture membrane is a fine sound transmission material as well as a fine sound absorption material. The experimental study provides a solid evidence for the modeling of sound transmission theory of PTFE micro-aperture membrane, and also provides a basis for the further research of sound transmission rule of micro-aperture membrane material.