85. Imagine that you hear two musical notes played on the piano. One tone sounds higher pitched than the other. The reason for this difference is that the wavelengths of the two sounds differ in
Answer: C
The difference in pitch between the two musical notes is due to their frequencies.
The higher-pitched tone corresponds to a higher frequency, which means that its sound wave oscillates more times per second compared to the lower-pitched tone.
A) decibels
Decibels measure the intensity or loudness of a sound, not its pitch. Therefore, while one tone may be louder than the other, this does not account for the difference in perceived pitch between the two notes.
B) timbre
Timbre refers to the quality or color of a sound that distinguishes different types of sound production, such as different instruments or voices. Although timbre can affect how we perceive sounds, it does not explain the difference in pitch between the two notes.
C) frequency
Frequency is the fundamental property that determines the pitch of a sound. A higher frequency results in a higher pitch, while a lower frequency produces a lower pitch. This directly accounts for the difference in pitch observed between the two musical notes.
D) amplitude
Amplitude relates to the loudness of a sound rather than its pitch. Two notes can have different amplitudes but still share the same frequency, which means that amplitude does not explain the difference in pitch between the tones.
E) complexity
Complexity refers to the harmonic content of a sound, which can influence timbre but not pitch. Thus, complexity does not address the differences in pitch between the two notes played on the piano.
Conclusion
Frequency is the key factor that distinguishes the pitches of the two musical notes, with higher frequencies corresponding to higher pitches. All other options fail to address this fundamental characteristic of sound, making option C the definitive correct answer in explaining the observed difference in pitch.