The Bruel and Kjaer noise dosimeter is kept in the pocket with a microphone that clips to a collar or similar. It's used for measuring a workplace noise dose and is ideal for OH&S surveys.
Logging of 1 or 2 parameters from a range of 6, with variable interval. 4 built-in and 3 user-defined setup routines, 5 selectable statistical levels Lx. Storage of up to 53,000 values over 16 measurement periods, and download [or setup] via PC using software provided. Battery powered.