The tones that are separated by three octaves have a frequency ratio of

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

How many times more intense is a $60 \ dB$ sound than a $30 \ dB$ sound?

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 .... $\text{dB}$

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

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