Velocity of sound waves in air is $330\; m/sec$. For a particular sound in air, a path difference of $40 \;cm$ is equivalent to a phase difference of $1.6 \pi$. The frequency of this wave is... $Hz$
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Two sound waves of slightly different frequencies have amplitude ratio $\frac{11}{9} .$ What is the difference of sound levels in decibels of maximum and minimum intensities heard at a point :- ............. $\mathrm{dB}$
Transverse waves of same frequency are generated in two steel wires $A$ and $B$. The diameter of $A$ is twice of $B$ and the tension in $A$ is half that in $B$. The ratio of velocities of wave in $A$ and $B$ is
A man fires a bullet standing between two cliffs. First echo is heard after $3$ seconds and second echo is heard after $ 5$ seconds. If the velocity of sound is $330 m/s$, then the distance between the cliffs is .... $m$
A cylindrical tube, open at both ends, has a fundamental frequency ${f_0}$ in air. The tube is dipped vertically into water such that half of its length is inside water. The fundamental frequency of the air column now is
A closed organ pipe of length $L$ and an open organ pipe contain gases of densities $\rho_{1}$ and $\rho_{2}$ respectively. The compressibility of gases are equal in both the pipes. Both the pipes are vibrating in their first overtone with same frequency. The length of the open pipe is $\frac{ x }{3} L \sqrt{\frac{\rho_{1}}{\rho_{2}}}$ where $x$ is ......... . (Round off to the Nearest Integer)
The difference between the apparent frequency of a source of sound as perceived by an observer during its approach and recession is $2\%$ of the natural frequency of the source. If the velocity of sound in air is $300 \,m/sec,$ the velocity of the source is ... $m/sec$ (It is given that velocity of source $<<$ velocity of sound)