What is the primary use of a "low-pass filter" in audio applications?

A) To boost high frequencies

B) To enhance low-frequency sounds while removing high-frequency noise

C) To equalize the audio signal

D) To amplify all frequencies equally

Answer: B) To enhance low-frequency sounds while removing high-frequency noise

Explanation: A low-pass filter in audio applications is used to allow low-frequency sounds to pass through while attenuating high-frequency noise, improving overall sound quality and clarity.