January 2018
Intermediate to advanced
524 pages
13h 33m
English
Content preview from Internet of Things for Architects
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MEMS microphones
MEMS devices can also be used for sound and vibration detection. These types of MEMS devices are related to the accelerometers previously covered. For IoT deployments, sound and vibration measurements are common in the industrial IoT and predictive maintenance applications. For example, an industrial machine that rotates or mixes a load of material in chemical manufacturing, or in centrifuges to separate mixtures, needs precise leveling. A MEMS sound or vibration unit will typically be used to monitor the health and safety of such equipment.
This type of sensor will require an analog-to-digital converter of sufficient sampling frequency. Additionally, an amplifier is used to strengthen the signal. The impedance of a MEMS ...
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