AUTOMOTIVE MEMS MICS SELECTION GUIDE 1
KNOWLES MICROPHONES AND VIBRATION
SENSORS FOR AUTOMOTIVE APPLICATIONS
SELECTION GUIDE
AUTOMOTIVE MEMS MICS SELECTION GUIDE 2
Knowles’ automotive microphones are engineered to a higher standard of quality and supply assurance to support the increasing
demands of the automotive market for hands-free calling, advanced voice assistance, parking assist with ultrasonic sensors, and in-cabin
noise cancellation for passenger comfort. The launch of the latest microphones marks Knowles’ further commitment to the automotive
market, building on its industry-leading high quality and innovation standards. The microphones follow the AECQ103003 qualiication
requirements set by the Automotive Electronics Council, the standardization body for establishing standards for reliable, high-quality
electronic components for use in the harsh automotive environment. Let us help you choose the right microphone for your project.
CUSTOMER CHALLENGES SOLUTION IMPACT ON MIC SPECS
COMMUNICATION
Hands Free Communication,
Phone calls
Beamforming (x2-x8 mics)
High SNR, maximum linearity (<1%)
even in loud environment for
eective algorithm operation
Emergency Call Temp/humidity robustness MEMS Reliability /Robustness to
variations
Voice-Enabled User Interface /
Conversational AI
Voice Wake / Barge-In
High SNR, Close to speaker --> High
AOP
PASSENGER
COMFORT
Cancel Engine/Road Noise
Active Noise Cancellation
(ANC)
ANC --> Low Latency and low LFRO
In-cabin Intercom
(SUV/MiniVan)
Beamforming (x2-x8 mics)
High SNR, maximum linearity (<1%)
even in loud environment for
eective algorithm operation
In-cabin presence detection Ultrasonic Response Wideband / Ultrasonic response
ADVANCED
FEATURES
Parking Assist Ultrasonic Response Wideband / Ultrasonic response
Smart tires Temp / humidity robustness
Stability at high temp / high
humidity, high pressure robustness
Listening to car surrounding /
Siren detection
Vibration sensor Environmental robustness
Retroit ECM with MEMS Replace with MEMS module Small package size
Emerging use cases like Voice UI, E-Call, ANC are driving new solutions and new mic requirements
AUTOMOTIVE CHALLENGES AND SOLUTIONS NEEDED
MEMS MICS FOR AUTO_R2
SENSOR DESCRIPTION SIZE SNR* 1% THD CURRENT
V2S
V2S200D
On lex:
KAS7000177
*NEW*
Voice Vibration
Sensor with
PDM output
3.30 ×
2.30 ×
0.93mm
64.5 dB (A)
(BW=100Hz-4kHz) > 10g
290μA @
768kHz
700μA @
2.4MHz
* SNR specs apply to normal mode. For low power mode specs, refer to the datasheet.
Introducing Vibration Sensing for Automotive Audio Applications
The V2S200D is a high bandwidth, low-power specialized vibration sensor which enables sound pickup, including in harsh environments.
It can be mounted on a car (windscreen, side mirror, or body panel) to
1. pick up external sounds including emergency vehicle sirens
2. process voice UI commands (eg. ‘open car trunk’)
Scale + Supply
5Yr Supply Warranty
Support
Field Quality
for Auto
Technology
Turnkey Provider
Quality
AECQ103003
AECQ103003 MEMS Microphones
Unlike a traditional microphone which requires extensive environmental
protection when mounted at the exterior of a car, a vibration sensor does
not have a port hole and is therefore inherently robust to wind, dust, dirt,
snow, and water. The PDM interface facilitates seamless integration on a PDM
bus. Listen to the V2S200D dierence on www.knowles.com/V2S/automotive.