General Radio 1558-A Octave Band Noise Analyzer (UNTESTED MAY NEED CALIBRATED)

1983 Gen Rad General Radio Sound Level Meter Genrad Type S2A UNTESTED!! As Is

Bruel & Kjaer 2219 Sound Level Meter w/ 4125 Mic.

Bruel & Kjaer Charge Amplifier Type 2635

GenRad General Radio 1565-A Sound Level Meter w/ Leather Case – Untested Vintage

Bruel & Kjaer B&K Integrator ZR-0020

Bruel & Kjaer Charge Amplifier Type 2635

Lot of 2 Bruel & Kjaer Prepolarized Free-Field 1/4" Precision Array Microphone