Larson David Model 870 Sound Level Meter

Larson Davis 800B Precision Integrating Sound Level Meter

General Radio 1933 Precision Sound Level Meter & Analyzer - UNTESTED

Bruel & Kjaer Barometer Pistonphone Sound Calibration Equipment 4220 Denmark

Bruel & Kjaer Multi-field 1/4” Microphone Type 4961 With Calibration Charts

Bruel & Kjaer B&K 2250 Sound Level Meter for parts or repair

Bruel & Kjaer 2610 Measuring Amplifier NO POWER CORD UNTESTED

Bruel&Kjaer AO-0028 Microphone Extension Cable 10 meters