Two sound waves of frequencies `100Hz` and `102Hz` and having same amplitude `'A'` are interfering. At a stationary detector, which can detect resultant amplitude greater than or equal to `A`. So, in a given time interval of 12 seconds, finds the total duration in which detector is active.

Two sound waves each of frequency 500Hz are travelling along the same line in opposite direction . If the speed of sound in air is 350 m/s. find the distance between the consecutive antinodes of the resulting stationary wave.

Sound waves of frequency 660 Hz fal normally on a perfectly reflecting wall. The shortest distance from the wall at which the pair particles have maximum amplitude of vibration is ……………… meters.

Two sound waves travelling in the same direction are superposed. Their frequencies are 300 and 302 Hz and their amplitudes are 0.2 and 0.3 mm , respectively a. What is the number of beats per second ? b. What are the maximum and minimum values of resultant amplitude during the formation of beats ? c. Calculate the ratio of maximum and minimum intensities of the resultant sound.

The planes sources of sound of frequency n_(1)=400Hz,n_(2)=401Hz of equal amplitude of a each, are sounded together. A detector receives waves from the two sources simultaneously. It can detect signals of amplitude with magnitude ge a only,

A source emitting sound of frequency 180 Hz is alced in front of a wall at a distance of 2 m from it. A detector is also placed in front of the weal at the same distance from it. Find the minimum distance between the source and the detector for which the detector detects a maximum of sound. Speed of sound in air =360ms^-1 .

A sound wave having a frequency of 100 Hz and pressure amplitude of 10 pa, then calculate the displacement amplitude (Given speed od sound in air = 340 m/s and density of air = 1.29 kg/m^(3) )

A source emitting sound of frequency 165 Hz is placed in frount of a wall at a distance of 2 m from it. A detector is also placed in fornt of the wall at the same distance from it. Find the distance between the source and the detector for which the detector detects phase difference of 2pi between the direct and reflected wave. Speed of sound in air = 330 m//s .

Two small loudspeakers A , B ( 1m apart) are connected to the same oscillator so that both emit sound waves of frequency 1700 Hz in phase . A sensitive detector , detects a maximum wave at P on the perpendicular bisector MP of AB and another maximum wave when it first reaches a point Q directly opposite to B . Calculate the speed c of the sound waves in air .