Question

which of the following affects the loudness of a sound?
b. wavelength
a. frequency
d. crest
c. amplitude

8
multiple choice 1 point
which of the following affects the pitch of a sound?
d. crest
a. frequency
b. wavelength
c. amplitude

Explanation:

• For the first question (loudness):
• Amplitude is the measure of the maximum displacement of particles in a wave. A larger amplitude means more energy is carried by the sound wave, resulting in a louder sound.
• Frequency affects pitch (how high or low a sound is), wavelength is related to frequency (\(v = f\lambda\), where \(v\) is the speed of sound, \(f\) is frequency, and \(\lambda\) is wavelength), and crest is just a part of a wave (the highest point) and does not directly affect loudness.
• For the second question (pitch):
• Frequency is the number of oscillations or vibrations per second. A higher - frequency sound wave causes the eardrum to vibrate more rapidly, and we perceive this as a higher - pitched sound. Amplitude affects loudness, wavelength is related to frequency (through the speed of sound formula \(v = f\lambda\)), and crest is a part of the wave structure with no direct relation to pitch.

Answer:

• First question: C. amplitude
• Second question: A. frequency