The DT9837A has been created to offer a highly accurate and rugged USB data-acquisition-module solution for use in sound- and vibration-measurement applications. It features four 24-bit IEPE (ICP) sensor inputs, which are synchronised with an analogue (24-bit) output and an additional tachometer input. As the compact module is self-powered via the USB connection, no external power supply is needed. It is thus highly suited for portable use with a notebook. Each analogue input is provided with a delta-sigma ADC. The sampling rate - 195 to 52.7 kHz - and the threshold trigger are programmable.