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

The musical interval between two tones of frequencies $320 \ Hz$ and $240 \ Hz$ is

Two identical sounds $S_1$ and $S_2$ reach at a point $P$ in phase. The resultant loudness at point $P$ is $n \, dB$ higher than the loudness of $S_1$. The value of $n$ is

Learned Indian classical vocalists do not like the accompaniment of a harmonium because

The power of 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 $200 \text{ mW}$. The power increase in decibels as compared to the original power is $.... \text{ dB}$.

The intensity of sound during the festival season increased by $100$ times. This could imply a decibel $(dB)$ level rise from