Waterproof Sound-Permeable Membrane \| TPU \| Mimoyin
Waterproof Sound-Permeable Membrane
Mimoyin Technology Co., Ltd. manufactures high-performance TPU waterproof sound-permeable membranes optimized for smart helmets, two-way radios, bone conduction headsets, and outdoor communication devices. Our membranes deliver clear voice pickup while providing IP67/IP68 waterproof protection.
How Sound-Permeable Membrane Works
TPU sound-permeable membranes utilize a micro-perforated or semi-porous structure that allows acoustic waves to transmit with minimal distortion while blocking water droplets and dust. Unlike standard acoustic vents focused on music playback, sound-permeable membranes prioritize voice clarity and wind noise reduction for communication devices.
Technical Specifications
| Parameter | Typical Value | Custom Range |
|---|---|---|
| Base Material | TPU (Thermoplastic Polyurethane) | Customizable |
| Waterproof Rating | IP67 | IP68 available |
| Acoustic Loss | ≤1.5dB @ 1kHz | ≤1.0dB (premium) |
| Wind Noise Reduction | ≥10dB @ 80km/h | Optimized structure |
| Air Permeability | 1000–2500 ml/min @ 7kPa | Customizable |
| Operating Temperature | -30°C to +80°C | -40°C to +100°C |
| Membrane Thickness | 0.08–0.3 mm | Ultra-thin options |
| Adhesive Options | Acrylic PSA | Silicone / Hot-melt |
| MOQ | 1000 pcs (samples 500 pcs) | Negotiable |
All specifications can be customized. Sample lead time: 3–5 days. Mass production: 7–15 days.
Key Applications
- Smart Helmets — Bluetooth communication systems requiring clear voice transmission in high-speed wind. Compare with acoustic vent membranes →
- Two-Way Radios / Intercoms — Rugged communication devices for construction, security, and outdoor activities.
- Bone Conduction Headsets — Open-ear audio devices needing waterproof voice output.
- Action Cameras / Dash Cams — Microphone protection with minimal audio degradation.
- Marine Communication Devices — Saltwater-resistant voice membranes for boating and fishing.
Why Choose Mimoyin Sound-Permeable Membrane
- Voice Clarity Focused — Optimized for speech frequencies (300Hz–3.4kHz).
- Wind Noise Reduction — Structural design minimizes wind turbulence interference.
- Rugged & Flexible — Withstands impacts, vibrations, and repeated flexing.
- IP67/IP68 Certified — Reliable waterproofing in rain, splash, and immersion scenarios.
- Custom Die-Cutting — Precision shapes for helmet cutouts, radio grilles, and camera housings.
Frequently Asked Questions
What is the difference between sound-permeable and acoustic vent membranes?
Acoustic vent membranes focus on music playback quality (flat frequency response). Sound-permeable membranes prioritize voice clarity and wind noise reduction for communication devices.
Can this membrane reduce wind noise?
Yes, our TPU sound-permeable membranes feature structural optimization that reduces wind noise by ≥10dB at speeds up to 80km/h.
Is it suitable for bone conduction devices?
Yes, the membrane allows vibration transmission while protecting internal components from water and dust.
How does it perform in heavy rain?
IP67-rated membranes withstand heavy rain and temporary immersion. IP68 versions handle continuous submersion.
Can I get samples for testing?
Yes, we provide free samples (customer covers shipping). Lead time: 3–5 working days. Request samples now →
Is it compatible with existing helmet designs?
Yes, we offer custom die-cutting based on your CAD drawings or physical samples for seamless integration.
Improve Voice Clarity in Harsh Environments
Contact our engineering team for technical consultation, free samples, and custom die-cutting solutions for your communication devices.
Frequently Asked Questions
What waterproof rating do your membranes achieve?
Our ePTFE waterproof breathable membranes achieve IP67 and IP68 protection grades. They withstand immersion at 1 meter depth for 30 minutes (IP67) and continuous submersion (IP68), while maintaining stable airflow for pressure equalization.
Can you provide custom sizes and die-cutting shapes?
Yes, we offer full custom die-cutting services. We can produce membranes in any size or shape according to your specifications, including round, rectangular, and complex custom geometries. Our Class 10,000 cleanroom ensures precision cutting for production volumes.
What is the minimum order quantity (MOQ)?
We support both prototyping and mass production. Free samples are available for testing with 3-5 working days delivery. For mass production, MOQ is flexible depending on the product specification and can be discussed based on your project requirements.
What industries and applications do your membranes serve?
Our membranes are widely used in automotive electronics, lithium batteries, smart wearables, consumer electronics, LED lighting, medical devices, and industrial sensors. Applications include speaker acoustic vents, pressure balance vents, microphone waterproof membranes, and battery venting solutions.
How long is the delivery time for samples and mass production?
Free samples are delivered within 3-5 working days via express shipping. Mass production typically takes 7-15 working days depending on order quantity and customization requirements. We provide one-stop technical support from sample testing to mass production.