What are the three key properties of sound waves?

What are the three key properties of sound waves?

• A. Amplitude, wavelength, and frequency.
• B. Height, depth, and velocity.
• C. Speed, direction, and pitch.
• D. Tone, color, and texture.

Answer: (A)

Understanding how a sound wave is described physically involves three key properties: amplitude, frequency, and wavelength. Amplitude tells how strong the oscillation is, which corresponds to loudness—the bigger the amplitude, the louder the sound. Frequency is how many cycles occur each second, which determines the pitch—the higher the frequency, the higher the pitch. Wavelength is the spatial distance between successive peaks; in a given medium, it is related to frequency and the speed of sound by the relation lambda = v / f. So for a fixed speed, increasing frequency shortens the wavelength. The other options mix perceptual or propagation concepts that aren’t the fundamental wave parameters. Height and depth are informal ways to refer to amplitude, but the standard description uses amplitude explicitly. Velocity describes how fast the wave travels through the medium, but it’s determined by the medium and isn’t one of the three intrinsic wave descriptors. Tone, color, and texture describe perceptual qualities like timbre, not the basic physical properties of the wave itself.

Understanding how a sound wave is described physically involves three key properties: amplitude, frequency, and wavelength. Amplitude tells how strong the oscillation is, which corresponds to loudness—the bigger the amplitude, the louder the sound. Frequency is how many cycles occur each second, which determines the pitch—the higher the frequency, the higher the pitch. Wavelength is the spatial distance between successive peaks; in a given medium, it is related to frequency and the speed of sound by the relation lambda = v / f. So for a fixed speed, increasing frequency shortens the wavelength.

The other options mix perceptual or propagation concepts that aren’t the fundamental wave parameters. Height and depth are informal ways to refer to amplitude, but the standard description uses amplitude explicitly. Velocity describes how fast the wave travels through the medium, but it’s determined by the medium and isn’t one of the three intrinsic wave descriptors. Tone, color, and texture describe perceptual qualities like timbre, not the basic physical properties of the wave itself.