HD 499 S1-1990
Integrating-Averaging Sound Level Meters

Standard No.

HD 499 S1-1990

Release Date

1990

Published By

European Committee for Electrotechnical Standardization（CENELEC）

Latest

HD 499 S1-1990

HD 499 S1-1990 history

• 1990 HD 499 S1-1990 Integrating-Averaging Sound Level Meters