[amp_mcq option1=”Decibel” option2=”Hertz” option3=”Amplifier” option4=”Acoustics” correct=”option1″]
The correct answer is A. Decibel.
A decibel (dB) is a logarithmic unit that expresses the ratio of a physical quantity (such as sound pressure, power, voltage, etc.) to a reference value. The reference value is often chosen so that a change of 1 dB corresponds to a change in the quantity that is just barely perceptible to the human ear.
Hertz (Hz) is the unit of measurement for frequency. Frequency is the number of cycles per second of a periodic wave. Sound waves are a type of periodic wave, and their frequency is what determines the pitch of the sound.
Amplifier is a device that increases the power of a signal. In the context of sound, an amplifier can be used to make a sound louder.
Acoustics is the study of sound. It is a branch of physics that deals with the production, transmission, and effects of sound waves.