Use of Telephones in Noisy Areas

Satisfactory, difficult and impossible noise levels for telephone use in noisy areas.

ConditionSIL (dB)Approx. dBADescription
Satisfactory< 65≈ 72Background noise does not interfere with telephone conversations
Difficult65 - 8072 - 87Background noise causes some difficulty in telephone conversations
Impossible> 80≈ 87Background noise makes telephone conversations impossible
Use of Telephones in Noisy Areas | MEPKit Engineering Tools | MEPKit