LSR Microphone Seal For Smart Door Lock

# LSR Microphone Seal For Smart Door Lock

Manufactured by 橡楚（湖北）橡胶有限公司

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Product Overview

The LSR Microphone Seal for Smart Door Lock is a precision-molded liquid silicone rubber component engineered to protect and optimize microphone performance in residential and commercial smart access systems. As a specialized Liquid Silicone Rubber (LSR) product from 橡楚（湖北）橡胶有限公司, this seal addresses core pain points in smart door lock design: reliable acoustic transmission, long-term environmental resistance, and consistent dimensional stability for high-volume manufacturing.

Smart door locks rely on integrated microphones for voice control, voice-activated unlocking, and remote voice communication. Without a properly designed seal, microphones are vulnerable to water intrusion, dust accumulation, structural vibration interference, and acoustic signal distortion that impairs voice recognition accuracy. Our LSR microphone seal is tailored to fit the compact form factors of modern smart door locks, creating a secure, air-permeable acoustic barrier that preserves signal clarity while blocking environmental contaminants. All our seals are produced in our facility located at 湖北省鄂州市鄂城区经济开发区凡口街道内河巷54号, with strict process control to ensure consistent quality across every production run.

Technical Specifications

Material Properties

This microphone seal is manufactured from 100% pure medical-grade raw liquid silicone rubber, with no added fillers or recycled materials that could compromise long-term performance. Key material properties are listed below:

Physical Performance

Our standard LSR microphone seals meet the following physical performance requirements:

Process Parameters

All seals are manufactured via precision liquid injection molding (LIM) to ensure tight dimensional tolerances:

Product Advantages

1. Optimized Acoustic Performance for Voice Recognition

Unlike generic rubber seals that muffle or distort voice signals, our LSR formulation and precision molding are tuned to preserve the frequency range of human speech. The low transmission loss (<3 dB across critical voice frequencies) ensures consistent, accurate voice recognition even in low-volume speaking scenarios, reducing false rejection rates for voice-activated unlocking functions.

2. Long-Term Environmental Durability

LSR’s inherent resistance to UV radiation, ozone, temperature fluctuation, and humidity makes it ideal for outdoor and semi-outdoor smart door lock installations. Our seals do not crack, harden, or shrink after years of exposure to extreme weather (from -40°C winter cold to 150°C summer heat in enclosed door spaces), maintaining their sealing and acoustic performance for the entire 10+ year service life of the smart lock.

3. Precision Molding for Consistent Mass Production

Our automated liquid injection molding process delivers tight dimensional tolerances that eliminate fit issues during smart lock assembly. Every seal is held to consistent specifications, reducing assembly line rework and rejection rates for smart lock manufacturers. We scale production from prototype quantities to high-volume orders to meet the needs of product development and mass manufacturing.

4. Non-Corrosive and Non-Degrading

Platinum-cured LSR does not leach plasticizers or low-molecular-weight siloxanes that can corrode metal microphone components or cloud plastic housing over time. This preserves the functionality and appearance of the entire smart lock assembly, avoiding premature product failure that can result from material migration of lower-quality seals.

Applications

The LSR Microphone Seal for Smart Door Lock is designed specifically for use in all types of smart access systems, including:

1. Residential smart door locks: Fits front door entry locks, apartment interior smart locks, and villa gate smart locks with integrated voice control and voice intercom functions. The seal provides IP65-level water and dust protection to withstand rain, wind, and daily dust exposure in outdoor entryway applications.
2. Commercial smart door locks: Used for office building entry locks, shared workspace access locks, and retail store smart locks that require reliable voice access 24/7. The durable LSR material resists frequent use and environmental wear, maintaining performance through thousands of opening cycles.
3. Outdoor smart access control systems: Suitable for community gate microphones, shared storage unit smart locks, and parking lot access control devices that are permanently exposed to outdoor conditions. The wide service temperature range ensures consistent performance in both extreme cold and hot climates.
4. Smart home entry integrated systems: Compatible with smart door locks that integrate whole-home voice control systems, providing clear acoustic transmission for voice commands to connected home devices.

In all use cases, the seal acts as a critical interface between the external environment and the internal microphone assembly, balancing acoustic permeability with protection from contaminants.

Selection Guide

Hardness Selection

We offer three standard hardness options to meet different design requirements:

• 20 Shore A: Ultra-soft seal for applications that require high compression conformity for uneven housing surfaces, ideal for low-volume custom designs.
• 30 Shore A (standard): Balanced softness and compression set resistance, suitable for most standard smart door lock designs, this is our most popular option.
• 40 Shore A: Firmer seal for high-tolerance precision applications, suitable for fully automated assembly lines that require rigid component shape retention.

Size Specifications

We offer two standard off-the-shelf sizes for common smart lock microphone modules, and we also provide custom molding for unique form factors:

• Standard 1: 8 mm diameter × 1 mm thickness (fits 6 mm microphone modules)
• Standard 2: 10 mm diameter × 1.2 mm thickness (fits 8 mm microphone modules)
• Custom sizes: We can engineer and mold seals to match your specific smart lock design, with dimensional tolerances maintained for all custom specifications.

Material Grade

We offer two material grades to meet different regulatory and performance requirements:

• Standard industrial grade: Meets RoHS and REACH requirements, suitable for most commercial and residential smart lock applications, at a cost-effective price point.
• Low-VOC medical-adjacent grade: Has lower volatile organic compound content, suitable for smart lock products marketed for indoor residential use and applications with strict low-emission requirements.

Quality Assurance

橡楚（湖北）橡胶有限公司 operates a quality management system certified to ISO 9001, with strict quality control protocols applied to every stage of production, from raw material incoming inspection to finished product outgoing testing.

Our quality control process includes:

1. Incoming inspection of raw LSR material to verify purity, hardness, and physical properties before production begins.
2. In-process dimensional checks every 2 hours during production to confirm compliance with specification tolerances.
3. 100% visual inspection to remove any seals with flash, blemishes, or molding defects before packaging.
4. Final lot testing of acoustic performance, compression set, and temperature resistance to confirm compliance with technical specifications.

We are committed to delivering consistent, defect-free LSR components to our global customers. For inquiries about custom designs, sample requests, or bulk orders, please contact us at:

• Address: 湖北省鄂州市鄂城区经济开发区凡口街道内河巷54号
• Phone: +86 18071171144
• Email: churubber@163.com