Broadband Data Acquisition: A Case for Displacement Sensors

Since geophones and accelerometers sense respectively particle velocity and particle acceleration, they both lack sensitivity at the low frequencies relative to their performance at the high frequencies. Whereas displacement sensors have a broad response especially at the very low frequencies. A field comparison of a displacement sensor and a 5 Hz geophone demonstrated that the response of the displacement sensor is essentially flat at low frequencies, while the geophone attenuates low frequencies below and above resonance.