Sound of frequency below 20 Hz is called             .

Related MCQs

• The term "infrasonic" applied to sound refers to sound waves below -
• The threshold frequency is the frequency below which -
• The threshold frequency is the frequency below which –
• Man perceives sound vibrations in the frequency ranges of –
• If input frequency of a full wave rectifier be n, then output frequency would be-
• Sound energy passing per second through a unit area held perpendicular is called -
• The device which converts sound energy into electrical enemy is called –
• Sensation of sound persists in our brain for about -
• Speed of sound is the greatest in :
• When a vibrating tuning fork is placed on a table, a loud sound is heard. This is due to –