Knowles Acoustics' sensor offering includes accelerometers and ultrasonic receivers/transmitters. Knowles also designs acoustic products, specifically MEMS based, surface mounted microphones.
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 Ultrasonic Sensor
Knowles offers a unique surface mount, MEMS based wide-band ultrasonic acoustic sensor for your application. Manufactured to detect and receive ultrasonic sounds in the air with a high degree of accuracy, its small size and 10K-65kHz frequency range make it a great addition to any application. Some examples include hand held telecommunication devices, positioning sensing, and pneumatic flow sensing.
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