In actual use, cars often experience driving in rainy days, wading and washing with high-pressure water gun. Therefore, the microphone outside the vehicle shall generally meet the requirements of IPX6 and IPX7 at the same time, and the waterproof grade requirements. The impact force of IPX6 waterproof test is quite large. Even if the appearance components of the microphone are blocked, the impact on water will be alleviated, but there is still a high waterproof requirement for the microphone waterproof breathable film.

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