In a harmonium,the intermediate notes between a note and its octave form:

In an orchestra,the musical sounds of different instruments are distinguished from one another by which of the following characteristics?

Two waves having sinusoidal waveforms have different wavelengths and different amplitudes. They will have:

$A$ hearing test is conducted on an aged person. It is found that her threshold of hearing is $20 \, dB$ at $1 \, kHz$ and it rises linearly with frequency to $60 \, dB$ at $9 \, kHz$. The minimum intensity of sound that the person can hear at $5 \, kHz$ is

The intensity level of a sound whose intensity is $10^{-8} \ W/m^2$ is: (in $dB$)

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