Question

1 multiple choice 1 point
what is the approximate threshold at which humans begin to experience pain from the volume of a sound?
130 db
150 db
30 db
60 db

2 multiple choice 1 point
the amplitude of a soundwave corresponds to which of the following perceptions?
pitch
color
brightness
volume

Explanation:

Analyze the threshold of pain for sound volume

The human threshold of pain for sound intensity is the point at which sound pressure levels begin to cause physical discomfort or pain in the ears. In standard acoustics and audiology, this threshold is generally accepted to be around \(130\text{ dB}\). Sounds at or above this level can cause immediate damage to the auditory system.

Analyze the perception of soundwave amplitude

Sound waves are characterized by physical properties that correspond to psychological perceptions:

• Amplitude refers to the height of the wave, which physically represents the amount of energy or pressure change. This corresponds directly to our perception of volume (or loudness).
• Frequency refers to the number of wave cycles per second, which corresponds to our perception of pitch.
• Color and brightness are visual perceptions related to light waves, not sound waves.

Therefore, the amplitude of a soundwave corresponds to the perception of volume.

Answer:

Question 1

• (A) 130 dB (Correct answer)
• (B) 150 dB
• (C) 30 dB
• (D) 60 dB

Question 2

• (A) pitch
• (B) color
• (C) brightness
• (D) volume (Correct answer)