Sound level meter Qty 1

Standard Telephones and Cables 4709A Sound Level Meter, a professional acoustic measuring instrument designed to measure sound pressure levels in decibels. Manufactured in England by STC, it was used in laboratories, telecommunications and industrial environments for noise measurement and acoustic testing. The analogue meter, weighting controls and filter connections reflect mid-century acoustic engineering practice prior to digital sound level meters. 1960s–1970s.

W26 x D17 x H35 cm.

Untested.