Report/Guide

Jarvis, D; Galloway, P C M; McNeill, H A (1996) Future transducer technology advances in acoustics - a strategy for the UK National Measurement System. NPL Report. CIRA(EXT)014

Sherwood, T R; McNeill, H A; Torr, G R (1995) Differences in the performance of metal-and plastic-cased TDH-39 and TDH-49 audiometric earphones, and consequences for their calibration. NPL Report. RSA(EXT)0058