For an echo to be distinguished as separate, it should reach the ear _________ of a second after the direct sound.

Related MCQs

• The amount of sound transmitted outside a room depends on the surface while the amount of sound reflected or absorbed depends on the sound insulation properties of the surface.
• The intensity of sound depends on the ear of the listener.
• Which of the following is not a characteristic of sound?
• Sound travels faster in gases than in solids.
• The velocity of sound in bricks is __________
• The intensity of sound is proportional to __________ of amplitude.
• Calculate the transmission loss given the sound levels measured on either side of the wall is 60 dB and 40 dB.
• Hard materials used for sound insulation are good absorbers.
• The sound insulation offered by rigid homogenous walls decreases with the increase in the thickness of the wall.
• In cavity wall construction for soundproofing, the width of the cavity should be at least _________