The intensity level of a sound of intensity $I$ is $30 \, dB$. The ratio $\frac{I}{I_0}$ is (where $I_0$ is the threshold of hearing).

$A$ small speaker delivers $2\, W$ of audio output. At what distance from the speaker will one detect $120\, dB$ intensity sound in $cm$?

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

To raise the pitch of a stringed musical instrument,the player can:

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:

$A$ musical scale is constructed by providing intermediate frequencies between a note and its octave which: