Kunshan Xinzhenpin New Thin Film Material Technology Co LTD.
| Color | White |
| Oleophobicity Grade | ≥ 7 |
| Supply Ability | Monthly Output: 300,000 sqm |
| Water Entry Pressure | ≥ 400 kPa |
| Payment Terms | T/T |
| Material Compliance | PFAS Free |
| Delivery Time | 15 working days |
| Moisture Vapor Transmission Rate | 8,000 – 18,000 g/m²·24h |
| Thickness | 0.10 – 0.50 mm |
| Size | Customizable |
| 90° Peel Strength | ≥ 15 N/25mm |
| Chemical Resistance | Corrosion-resistant，Acid-resistant |
| Waterproof Rating | IP68 |
| Packaging Details | Small orders by express; bulk orders by FCL sea freight. |
| Air Permeability | Gurley：3 – 30 s/100ml @ 300 ml |
| Operating Temperature | -40°C to +150°C |
| Place of Origin | China |
| Certification | IATF16949/ISO |
| Model Number | OEM/ODM |
| Brand Name | OEM/ODM |
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Product Specification
| Color | White | Oleophobicity Grade | ≥ 7 |
| Supply Ability | Monthly Output: 300,000 sqm | Water Entry Pressure | ≥ 400 kPa |
| Payment Terms | T/T | Material Compliance | PFAS Free |
| Delivery Time | 15 working days | Moisture Vapor Transmission Rate | 8,000 – 18,000 g/m²·24h |
| Thickness | 0.10 – 0.50 mm | Size | Customizable |
| 90° Peel Strength | ≥ 15 N/25mm | Chemical Resistance | Corrosion-resistant，Acid-resistant |
| Waterproof Rating | IP68 | Packaging Details | Small orders by express; bulk orders by FCL sea freight. |
| Air Permeability | Gurley：3 – 30 s/100ml @ 300 ml | Operating Temperature | -40°C to +150°C |
| Place of Origin | China | Certification | IATF16949/ISO |
| Model Number | OEM/ODM | Brand Name | OEM/ODM |
| High Light | Drone Microphone Acoustic Vent Membrane ，Noise Reduction Protection Eptfe Vent ，Microphone Vent | ||
EPTFE Drone Microphone Acoustic Vent For Noise Reduction And Protection
This EPTFE acoustic vent is specifically engineered for drone microphones operating in challenging aerial environments where propeller wash, high-velocity wind, and sudden rain showers threaten audio capture. The vent serves a dual purpose: it passively attenuates wind buffeting noise that can overwhelm the microphone element, and it provides a waterproof barrier against precipitation during flight. With a weight of only 0.02 grams per square centimeter, it adds negligible mass to small UAV platforms where every gram directly impacts flight time. The membrane's calibrated acoustic resistance, typically between 800 and 2500 Rayls (MKS), dampens turbulent pressure fluctuations while allowing the desired ambient sound and motor feedback to pass clearly. The material is also UV-stabilized and withstands rapid barometric changes during aggressive ascent and descent maneuvers. Whether the drone is used for FPV live streaming, industrial inspection audio logging, or aerial videography, this vent ensures the microphone survives and delivers clean, usable audio.
Drone audio suffers from two primary enemies: wind noise and water damage. Wind gusts create high-intensity low-frequency pressure pulses that saturate the microphone and render recordings useless. Rain can instantly short-circuit an unprotected MEMS or electret mic. Traditional solutions like bulky dead-cat wind muffs are impractical on drones because they add weight, drag, and visual obstruction. This EPTFE vent provides a lightweight, passive solution that acts as an acoustic low-pass filter, rejecting turbulent wind energy while preserving voice and environmental sounds. Its hydrophobic nature means the drone can operate in light rain or mist without the microphone failing. The vent eliminates the need for active wind-noise DSP algorithms, reducing computational load and power consumption on the drone's processor.
| Parameter | Typical Value |
|---|---|
| Material | EPTFE membrane with tailored acoustic resistance |
| Thickness | 0.10 ± 0.02 mm |
| Acoustic Resistance (MKS Rayls) | 800 – 2500 (application tunable) |
| Pore Size | 0.1 – 0.3 μm |
| Air Permeability (Gurley) | 50 – 150 sec/100ml (depending on resistance) |
| Water Entry Pressure | ≥ 0.08 MPa |
| Wind Noise Attenuation (A-weighted) | Up to 18 dB reduction |
| Insertion Loss (desired signal 100 Hz – 4 kHz) | ≤ 2.5 dB |
| Weight per Unit Area | 0.02 g/cm² |
| Operating Temperature | -20°C to +75°C |
| UV Resistance | No degradation after 1000 hours QUV |
FPV racing and freestyle drone microphones, aerial photography multicopter audio recording, industrial inspection drone acoustic anomaly sensors, and agricultural spraying drone communication mics.
The vent is placed directly over the microphone port. Incoming sound consists of desired pressure waves (relatively organized) and wind turbulence (chaotic pressure fluctuations). The EPTFE membrane's calibrated acoustic resistance converts some of the turbulent kinetic energy into heat through viscous friction as air moves through the tortuous pore network. Because wind noise predominantly occupies the low-frequency spectrum, the vent's natural acoustic impedance acts as a high-pass filter, attenuating rumble while letting through higher-frequency speech and motor sounds. Simultaneously, the hydrophobic pores prevent liquid water from entering, keeping the mic dry even when flying through cloud mist or drizzle.
Q1: Does the vent add latency to the audio signal for FPV use?
A: No. The vent is a passive acoustic component with no electronic latency. The speed of sound through air in the pores is unchanged, so audio remains in real-time sync with video.
Q2: Will the vent affect the ability to hear motor RPM changes for throttle control?
A: The vent is tuned to allow motor frequencies (typically 200 Hz – 800 Hz at cruise) to pass clearly. It primarily reduces broadband wind rumble, so RPM audibility is preserved.
Q3: Can the membrane handle high altitudes and rapid pressure changes?
A: Yes. The microporous structure equalizes pressure nearly instantaneously. Drones ascending from sea level to 5000 meters will see no membrane deformation or acoustic shift.
Company Details
Business Type:
Manufacturer,Exporter
Year Established:
2018
Total Annual:
1,000,000-2,000,000
Employee Number:
30~50
Ecer Certification：
Verified Supplier
Kunshan Xinzhenpin New Thin Film Material Technology Co., Ltd. Established in 2018, Kunshan Xinzhenpin is a specialized manufacturer dedicated to ePTFE waterproof and breathable membrane solutions. We operate a fully integrated production chain covering ePTFE raw membrane manufacturing, composite a... Kunshan Xinzhenpin New Thin Film Material Technology Co., Ltd. Established in 2018, Kunshan Xinzhenpin is a specialized manufacturer dedicated to ePTFE waterproof and breathable membrane solutions. We operate a fully integrated production chain covering ePTFE raw membrane manufacturing, composite a...
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