Question 1

Sound power of a machine whose specified sound power level is 125 dB

Accepted Answer

The sound power level (Lw) in decibels (dB) is related to the actual sound power (W) in watts by the formula Lw = 10 * log10(W/W0), where W0 = 1 picoWatt (1x10^-12 W). Given Lw = 125 dB, solving for W gives W = 10^((Lw/10)) * W0 = 10^((125/10)) * 1x10^-12 W = 3.16 W.

Question 2

The process of maintaining appropriate noise level without considering economic factors is called as _____

Accepted Answer

The answer of The process of maintaining appropriate noise level...

Question 3

Basic elements of noise control are

Accepted Answer

The basic elements of noise control include the source of the noise, the path through which the noise travels, and the receiver of the noise. These elements are fundamental in understanding and managing noise pollution and its impacts.

Question 4

All sound is noise.

Accepted Answer

Sound is a vibration that propagates as an acoustic wave, through a transmission medium such as a gas, liquid or solid. Not all sounds are considered noise; noise is generally regarded as unwanted sound.

Quiz 6: Measuring Vibrations and Sound

Sound power of a machine whose specified sound power level is 125 dB

The process of maintaining appropriate noise level without considering economic factors is called as _____

Basic elements of noise control are

All sound is noise.