With the improvement of both consumer and enterprise’s safety awareness, security monitoring products have been popularized to all aspects of life and work. In order to ensure effective interaction, information transmission and recording, security monitoring products usually have voice interaction functions. Since acoustic devices are sensitive, they must be connected to the external environment to effectively transmit and record sound. However, the outdoor environment is usually very harsh with changeable climate, which requires security cameras to be highly waterproof. IPRO acoustic vents installed at the sound permeable hole can prevent rainwater and other liquids from entering the interior of acoustic devices, thus reducing sound loss, blocking external pollutants, and restoring the original sound.