The note "Saa" on the Sarod and the Sitar have the same pitch. The property of sound that is most important in distinguishing between the two instruments is

If the threshold of hearing is assumed to be the reference $(0 \ dB)$,then the threshold of pain is taken to be $120 \ dB$. Let the corresponding sound intensities be $I_0$ and $I$ respectively. Then $\frac{I_0}{I}$ is:

$A$ sound absorber attenuates (decreases) the sound level by $20 \ dB$. The intensity decreases by a factor of

Tone $A$ has a frequency of $240 Hz$. Of the following tones,which one will sound least harmonious with $A$ (in $Hz$)?

$A$ sound absorber attenuates the sound level by $20 \ dB$. The intensity decreases by a factor of

The power of a sound from the speaker of a radio is $20 \text{ mW}$. By turning the knob of the volume control,the power of the sound is increased to $400 \text{ mW}$. The power increase in decibels as compared to the original power is .... $\text{dB}$