The amount of sound energy passing each second through unit area is called the _____ of sound.

The correct answer is Intensity.

Explanation:

• The intensity of sound is defined as the amount of sound energy that passes per second through a unit area held perpendicular to the direction of propagation of sound waves. 
• Intensity is typically measured in watts per square meter (W/m²).
• It determines the loudness of the sound wave.
• Intensity of sound indicates how much energy is transmitted through a particular area in a given time.

Thus, The amount of sound energy passing each second through unit area is called the intensity of sound.

Additional InformationLoudness

• Loudness of sound is proportional to the square of the amplitude of the vibration producing the sound. 
• The loudness is expressed in a unit called decibel (dB). 
• The loudness of sound depends on its amplitude. 

Audible Range

• The audible range refers to the range of frequencies that the average human ear can detect or perceive as sound.
• Generally, the audible range for humans spans from about 20 Hertz (Hz) to 20,000 Hz (20 kilohertz, kHz).

Reverberation

• Reverberation refers to the persistence of sound in an enclosed space after the sound source has stopped producing the sound.