You need more specifications for the MEMS accelerometers; such as frequency range (min - max.), mounted natural frequency, and output range (min. - max.). The sound sensor (microphone) should be specified in dB-SPL (20 micro-Pascal pressure reference) and and not a voltage reference. The rest of the information from Party A and B make little sense! Will you be analyzing the output (analog voltage or digital) with your software or just looking at spectral data from the sensor OEM? You need the bearing fault frequencies andany other periodic forcing frequencies related to shaft speed.
Accelerometer Specifications - Quick Definitions
How to Build a MEMS-Based Solution for Vibration Detection in Condition Monitoring