Question

Sound waves 

A. Are quantified on the decibel scale which is logarithmic. 

B. With an intensity of 0 decibels are inaudible. 

C. May have an intensity of minus 10 decibels. 

D. With an intensity of 90 decibels are usually painful. 

E. Are heard as a note one octave higher when their frequency increases eight-fold.

Answer 1

A. True Loudness is related to the logarithm of sound intensity.

B. False Zero decibels is the average threshold for hearing. 

C. True These sounds may be heard by people whose hearing ability is above average. 

D. False The threshold for pain is around 120 decibels. 

E. False They sound one octave higher when their frequency is doubled.