Final answer:
The correct answer is c. Decibels. Sound pressure level is expressed in decibels (dB), which is a unit used to measure the level of audio signals and noise. It is a logarithmic scale that compares the pressure amplitude of sound waves to a reference pressure level.
Step-by-step explanation:
The correct answer is c. Decibels.
Sound pressure level is expressed in decibels (dB), which is a unit used to measure the level of audio signals and noise. It is a logarithmic scale that compares the pressure amplitude of sound waves to a reference pressure level.
For example, the sound pressure level (SPL) of a quiet room may be around 30 dB, while the SPL of a loud rock concert can reach 100 dB or higher.