Question

The noise scale of normal conversation ?

• A. 10 Db
• B. 60 Db
• C. 50 Db
• D. 30 Db

Answer 1

Answer:

D. 30 Db

• The disturbance produced due to undesirable loud and harsh sound of the level above 120 dB from the various sources such as a loudspeaker, moving vehicles etc in the environment is called noise pollution.
  The safe limit of sound level in dB for our ears is up to 120 dB.