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INDIAN STANDARDS  
IS: 2526 - 1963
:
Code of practice for acoustical design of auditoriums and conference halls.
IS: 9736 - 1981
:
Glossary of terms applicable to acoustics in buildings.
IS: 9000 (Part 21) - 1985
:
Basic environmental testing procedures for electronic and electrical items.Acoustic Noise Test
IS: 2264 - 1963
:
Preferred frequencies for acoustical measurements.
IS: 9876 - 1981
:
Guide to the measurement of airborne acoustical noise and evaluation of its effects on man.
IS: 4954 - 1968
:
Recommendations for noise abatement in town planning.
IS: 7194 - 1973
:
Specification for assessment of noise-exposure during work for hearing conservation purposes.
IS: 4242 - 1967
:
Method of measurement of acoustical noise emitted by ballasts for gaseous discharge lamps.
IS: 6964 - 1973
:
Specification for octave, half-octave and third-octave band filters for analysis of sound and vibrations.
IS: 10775 - 1984
:
Specification for body level hearing aids
IS: 1885 (Part III / Sec 1) - 1965
:
Electro technical Vocabulary Physical Acoustics
IS: 1885 (Part III / Sec 2) - 1966
:
Electro technical Vocabulary Acoustical Electro-Acoustical System
IS: 1885 (Part III / Sec 4) - 1966
:
Electro technical Vocabulary Sonics, Ultrasonic and Underwater acoustics
IS: 1885 (Part III / Sec 5) - 1966
:
Electro technical Vocabulary Speech and Hearing
IS: 1885 (Part III / Sec 6) - 1967
:
Electro technical Vocabulary Acoustical Instruments
IS: 1885 (Part III / Sec 7) - 1978
:
Electro technical Vocabulary Music
IS: 1885 (Part III / Sec 8) - 1974
:
Electro technical Vocabulary Architectural Acoustics
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Acoustic Enclosure supplied by Envirotech, has fulfilled CPCB Norms without affecting DG set performance.
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The Noise Test Booth designed by Envirotech (ESPL) has acieved the desired noise level i.e 35 dB(A) in side the chamber.
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The design of Anechoic Chamber has fulfill our requirement & no echo generation was found inside the chamber .
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