GORE® Acoustic Vents for Automotive Microphones
GORE® Acoustic Vents for Automotive Microphones are pressure-sensitive adhesive-mounted ePTFE membrane vent components designed to protect exterior-mounted MEMS microphone ports in automotive systems while maintaining acoustic transparency. Available in two variants — AVS 700 (black membrane) and AVS 701 (grey membrane) — both deliver IP6K8 dust and water ingress protection per ISO 20653 at 2 meters for 1 hour, with a minimum Water Entry Pressure (WEP) of ≥ 60 kPa for 30 seconds. Acoustic performance is maintained at less than 2 dB change through 1.5 kHz and less than 3 dB change through 5 kHz.
The ePTFE membrane construction is 100% ePTFE (type AAM1XX) without backing material, treated to be both hydrophobic and oleophobic. The vents bond to PCB or housing substrates via TPA117 acrylic pressure-sensitive adhesive and are designed for manual installation. The overall vent thickness for both variants is 0.26 mm nominal. Both variants are validated for automotive durability and manufactured in an IATF-certified facility.
GORE® Acoustic Vents for Automotive Microphones have been extensively tested for thermal shock resistance per ISO 16750-4, high-temperature resistance at +105 °C for 500 hours, fluid resistance per ISO 16750-5, climate resistance per IEC 60068-2-67 (85 °C / 85% RH / 1,000 hours), and salt spray resistance per ISO 16750-4 per IEC 60068-2-52 Test Method 5. Compliant with RoHS Directive 2011/65/EU.
Key Properties
- Ingress Protection Rating: IP6K8 — dust and water (2 meters / 1 hour) per ISO 20653
- Minimum Water Entry Pressure (WEP): ≥ 60 kPa / 30 sec (properly-installed part)
- Frequency Response: < 2 dB change through 1.5 kHz and < 3 dB change through 5 kHz
- Operating Temperature Range: -40 °C to +105 °C
- Membrane Type: 100% ePTFE (AAM1XX), without backing material
- Vent Thickness: 0.26 mm (nominal aggregate, all layers)
We want to help!
Enter your information and we'll get you in touch with our knowledgable staff. We know how important to the right product for your project.
Request a Consultation
- Specifications
- Applications
- General Info
- FAQs
Product Identification
| Property | AVS 700 | AVS 701 | Test Method |
| Product name (sample order number) | AVS 700 | AVS 701 | — |
| Product number (series production order number) | AAV10307 | AAV10307-R | — |
| Product quantity / form | 200 pcs / sheet | 200 pcs / sheet | — |
Acoustic & Protection Performance
| Property | AVS 700 | AVS 701 | Test Method |
| Ingress Protection (IP) Rating | IP6K8 dust and water (2 meters / 1 hour) per ISO 20653 | IP6K8 dust and water (2 meters / 1 hour) per ISO 20653 | ISO 20653 |
| Frequency Response | < 2 dB change through 1.5 kHz and < 3 dB change through 5 kHz | < 2 dB change through 1.5 kHz and < 3 dB change through 5 kHz | Tested using analog MEMS microphone, 1 mm from vent with 1 mm diameter acoustic opening |
| Minimum Water Entry Pressure (WEP), properly-installed part | ≥ 60 kPa / 30 sec | ≥ 60 kPa / 30 sec | — |
| Operating temperatures | -40 °C to +105 °C | -40 °C to +105 °C | — |
Physical & Construction Properties
| Property | AVS 700 | AVS 701 | Test Method |
| Membrane characteristic | Hydrophobic and oleophobic | Hydrophobic and oleophobic | — |
| Membrane color (viewed from top) | Black | Grey | — |
| Membrane type | 100% ePTFE (AAM1XX) | 100% ePTFE (AAM1XX) | — |
| Membrane construction | All membrane, without backing material | All membrane, without backing material | — |
| Support ring | PET | PET | — |
| Pressure-sensitive adhesive | TPA117 Acrylic | TPA117 Acrylic | — |
| Recommended substrates | All typical metals, plastics and circuit board materials | All typical metals, plastics and circuit board materials | — |
| Vent installation | Designed for manual installation | Designed for manual installation | — |
| Vent thickness (nominal aggregate, all layers) | 0.26 mm | 0.26 mm | — |
Design Dimensions
| Property | Value | Test Method |
| Outer diameter | 7.0 mm | — |
| Support ring inner diameter | 3.5 mm | — |
| Active area inner diameter | 3.0 mm | — |
Environmental Performance
| Test | Method | Test Conditions |
| Thermal Shock Resistance | ISO 16750-4 | Cycling between Tmin and Tmax within 30 seconds; 10 minutes conditioning at each temperature; minimum 200 cycles |
| High-Temperature Resistance | — | Heating to +105 °C for 500 hours |
| Fluid Resistance | ISO 16750-5 | Performance depends on application method and specific contaminant applied |
| Climate Resistance | IEC 60068-2-67 | 85 °C temperature, 85% relative humidity, 1,000 hours |
| Salt Spray Resistance | ISO 16750-4 per IEC 60068-2-52 | Test Method 5 (equals a four-week test period) |
Compliance
- RoHS Directive 2011/65/EU — Meets threshold requirements
- ISO 20653 — IP6K8 dust and water ingress protection
- IATF 16949 — Certified manufacturing facility
- Exterior-mounted MEMS microphone port protection in ADAS-enabled vehicles
- Sound-monitoring system sealing in autonomous and semi-autonomous vehicle platforms
- Acoustic aperture protection in MaaS vehicle sensor arrays
- Microphone port venting in exterior automotive modules requiring IP6K8 dust and water resistance
- PCB-mounted acoustic vent integration in automotive electronics exposed to automotive fluid contamination
Common industries: Automotive, autonomous vehicle systems, ADAS technology.
GORE® Acoustic Vents for Automotive Microphones address the protection and acoustic performance requirements of exterior-mounted sound-monitoring systems used in ADAS (Advanced Driver-Assistance Systems), MaaS (Mobility-as-a-Service), and similar automotive technologies.
Any microphone-based system mounted to the exterior of a vehicle must maintain consistent acoustic transparency while withstanding dust, dirt, water, and automotive fluids — conditions under which conventional protective measures typically compromise audio quality. These vents are sized to fit acoustic openings up to 2.5 mm diameter.
Both AVS 700 and AVS 701 share identical functional performance — IP6K8 protection, identical WEP, frequency response, operating temperature range, membrane type, adhesive, and support ring construction. They differ only in membrane color as viewed from the top: AVS 700 is black and AVS 701 is grey, accommodating different housing color or aesthetic requirements. Both are supplied in sheet form at 200 pieces per sheet.
The vent outer diameter is 7.0 mm, with a support ring inner diameter of 3.5 mm and an active membrane area of 3.0 mm inner diameter. For AVS 700, the support ring faces the external environment (black, oleophobic side visible); for AVS 701, the mounting adhesive faces the external environment (black, oleophobic side visible from opposite orientation).
Environmental durability testing has been conducted for thermal shock per ISO 16750-4 (cycling between Tmin and Tmax within 30 seconds, 10 minutes conditioning per temperature, minimum 200 cycles), sustained high-temperature exposure at +105 °C for 500 hours, fluid resistance per ISO 16750-5, climate resistance per IEC 60068-2-67 (85 °C, 85% RH, 1,000 hours), and salt spray resistance per ISO 16750-4 referencing IEC 60068-2-52 Test Method 5 (equivalent to a four-week test period).
Compliant with RoHS Directive 2011/65/EU (meets threshold requirements). Manufactured at an IATF 16949-certified facility.
What differentiates AVS 700 from AVS 701?
AVS 700 and AVS 701 are functionally identical — same ePTFE membrane type, same IP6K8 protection, same WEP, same frequency response, same operating temperature range, same adhesive and construction. The only difference is membrane color: AVS 700 is black (viewed from top) and AVS 701 is grey, allowing designers to match the vent appearance to housing color or assembly orientation requirements. Installation orientation also differs: AVS 700 mounts with the support ring facing the external environment; AVS 701 mounts with the adhesive facing the external environment.
Why does acoustic frequency response matter for exterior-mounted automotive microphones?
Exterior-mounted microphones used in ADAS and similar systems must maintain consistent acoustic transparency to accurately capture sound for voice recognition, noise monitoring, or event detection. A vent that introduces significant frequency-dependent insertion loss — particularly in the 1.5–5 kHz range critical to speech intelligibility and environmental sound monitoring — degrades the sensor's ability to function reliably. Both AVS 700 and AVS 701 are specified at less than 2 dB change through 1.5 kHz and less than 3 dB through 5 kHz, preserving the signal quality required for these systems.
What is the operating temperature range for GORE® Acoustic Vents for Automotive Microphones?
-40 °C to +105 °C.
Are GORE® Acoustic Vents for Automotive Microphones suitable for automotive-grade regulated environments?
Yes. Both variants achieve IP6K8 dust and water ingress protection per ISO 20653 and are manufactured at an IATF 16949-certified facility. They meet the threshold requirements of RoHS Directive 2011/65/EU and have been validated against automotive durability test protocols including thermal shock (ISO 16750-4), fluid resistance (ISO 16750-5), climate resistance (IEC 60068-2-67), and salt spray resistance.
How should GORE® Acoustic Vents for Automotive Microphones be specified?
Specify variant (AVS 700 or AVS 701), membrane color preference, substrate type (metal, plastic, or circuit board), installation method (manual), and required IP rating (IP6K8 per ISO 20653). Reference the Gore Design Guidelines for Acoustic Vents for Automotive Microphones for housing geometry and stack-up requirements, as assembled device IP performance depends on product housing design.
