Which term is defined as any pressure variation the human ear can detect?

Which term is defined as any pressure variation the human ear can detect?

• A. Frequency
• B. Amplitude
• C. Wave
• D. Noise

Answer: (D)

Sound is the audible pressure variation in a medium that the human ear can detect. The ear perceives these fluctuations as acoustic energy traveling through air or other media. Frequency describes how often the pressure wave repeats each second, which determines pitch. Amplitude is the size of the pressure change, which relates to loudness. A wave is the traveling disturbance that carries that energy from source to listener. Noise is typically used to refer to unwanted or random components of sound, rather than every detectable pressure variation. Therefore, the term defined by the statement is sound.

Sound is the audible pressure variation in a medium that the human ear can detect. The ear perceives these fluctuations as acoustic energy traveling through air or other media. Frequency describes how often the pressure wave repeats each second, which determines pitch. Amplitude is the size of the pressure change, which relates to loudness. A wave is the traveling disturbance that carries that energy from source to listener. Noise is typically used to refer to unwanted or random components of sound, rather than every detectable pressure variation. Therefore, the term defined by the statement is sound.