Spatial pulse length is directly proportional to which quantity?

Spatial pulse length is directly proportional to which quantity?

• A. Amplitude
• B. Wavelength
• C. The number of cycles in the pulse
• D. Frequency

Answer: (B)

Spatial pulse length is the physical length of one pulse in space, and it equals the number of cycles in the pulse multiplied by the wavelength. Because of this, the spatial pulse length changes directly with wavelength: if you keep the number of cycles the same and increase the wavelength, the pulse spans more distance. Amplitude affects how strong the pulse is, not how long it extends in space. The number of cycles does influence SPL, but the direct, primary relationship you’re being tested on is with wavelength. Since frequency and wavelength are inversely related, increasing frequency would shorten the wavelength and thus shorten the spatial pulse length for a fixed cycle count.

Spatial pulse length is the physical length of one pulse in space, and it equals the number of cycles in the pulse multiplied by the wavelength. Because of this, the spatial pulse length changes directly with wavelength: if you keep the number of cycles the same and increase the wavelength, the pulse spans more distance. Amplitude affects how strong the pulse is, not how long it extends in space. The number of cycles does influence SPL, but the direct, primary relationship you’re being tested on is with wavelength. Since frequency and wavelength are inversely related, increasing frequency would shorten the wavelength and thus shorten the spatial pulse length for a fixed cycle count.