Final answer:
As the frequency of a sound wave decreases, the pitch also becomes lower. Frequency and pitch have a direct relationship, while amplitude relates to the volume of the sound.
Step-by-step explanation:
As the frequency of a sound wave increases, the pitch of the sound gets lower. This statement is actually incorrect. The correct relationship is that as the frequency of a sound wave decreases, the pitch becomes lower. Frequency and pitch are directly related—when one increases, the other does as well. For example, the chirp of a bird, which is a high-frequency sound, has a high pitch, whereas the roar of a lion, which is a lower-frequency sound, has a lower pitch. In terms of sound waves, wavelength is inversely related to frequency, where a longer wavelength corresponds to a lower pitch, whereas a shorter wavelength corresponds to a higher pitch. The amplitude of a sound wave refers to its volume, not pitch. Therefore, a sound with a lower frequency will have a lower pitch, and this can be observed when comparing high-pitch instruments, which are generally smaller, generating shorter wavelengths, to low-pitch instruments, which are larger and generate longer wavelengths.