Environmentally Robust Automotive Audio Vibration Sensor

A high bandwidth, low-noise specialized vibration sensor for sound pickup in harsh environments

Beyond Vision: The Power of Sound

As vehicles become more intelligent, the integration of diverse types of sensors such as cameras, LiDAR, radar, and ultrasonic sensors is essential for creating a comprehensive perception of the surrounding environment. In addition to vision sensors, several use cases such as emergency vehicle detection and voice commands have recently emerged, proving the need to pick up reliably sounds external to the vehicle. Autonomous driving (SAE Level 3 and beyond) for instance requires the capability to detect an approaching emergency vehicle and react accordingly. MEMS microphones, traditionally used for this purpose, are prone to failure in harsh environments, exposed to snow, dust, water, and other contaminants through their acoustic porthole.

Read the full article on EE Times

Knowles’ porthole-less V2S200D vibration sensor is a robust alternative to traditional capacitive MEMS microphones and is specifically designed to deal with the demanding environments of automotive applications. With its small size, high signal-to-noise ratio (SNR), and large bandwidth, V2S200D achieves comparable performance to a traditional MEMS microphone. The PDM output interface facilitates seamless integration with vehicle electronic systems, offering automotive OEMs and Tier-1 suppliers a more dependable, high-performance, and cost-effective alternative to traditional MEMS microphones.


Use Cases

Emergency vehicle detection
Voice commands


Environmental robustness
Ease of integration
Challenges with Exsisting Mic Tech-Figure 2


Experience the V2S200D Difference




Emergency Vehicle Detection (EVD)

Sensor LocationConditionsRecording


Stationary, 10m distant from siren

Car trunk

Moving away from siren at 10-15mph


Moving towards siren from 0mph to 25mph (initial distance 150m)

Car trunk

Moving towards siren from 0mph to 25mph (initial distance 150m)


Voice Commands

Sensor LocationConditionsRecording

Car door

Stationary, voice pickup from outside the car at various distances


For more details on V2S and for ordering samples refer to V2S200D