The following are manufacturers of sound measuring and analyzing equipment.
 
Bruel & Kjaer (Denmark)

Larson Davis (USA)

3M Quest Technologies (USA)

Casella (England)

Rion (Japan)

Norsonic (Norway)

Cirrus Research (England)

Ono Sokki (Japan)

CESVA (Spain)

01dB (France)

Svantek (Poland)


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