Measurement acoustic sensor

high-sensitivity

The Acoustic Envelope Detector is an instrument that measures the acoustic energy released by a sample as it is being deformed by the Texture Analyser (Plus models only) and, in conjunction with Exponent Connect software, converts and displays this in decibels (dB) – the standard measurement of sound. Acoustic emissions, in the audible range up to a frequency of 12.5kHz, are detected close to the sample using a microphone and pre-amplifier from Danish sound and vibration experts Brüel & Kjær which has high sensitivity to the frequencies emitted by brittle products, but has low sensitivity to mechanical noise emitted by the Texture Analyser. This information is converted from an analogue signal (voltage) that represents the total acoustic energy released from the product as it varies with time. This voltage is measured while the TA.XTplusC and TA.HDplusC Texture Analyser simultaneously measures the force, distance and time to provide the 4th dimension in texture analysis.