Which statement correctly contrasts the two echolocation pitch types?

Which statement correctly contrasts the two echolocation pitch types?

• A. Constant frequency calls have a changing pitch
• B. Constant frequency calls are used for distance measurement
• C. Constant frequency calls have a steady pitch for tracking; Frequency modulation calls have changing pitch for detailed information
• D. Both call types use identical pitch and purposes

Answer: (C)

In echolocation, two pitch strategies are used: constant-frequency calls and frequency-modulated calls. A constant-frequency call stays at roughly one pitch for a longer time, which lets the bat pick up small shifts in the returning echo’s frequency as the target moves. That Doppler-shift information is ideal for tracking updating on a moving target’s speed and position. A frequency-modulated call sweeps through a range of pitches during the call. This broad sweep provides rich, high-resolution information about distance and the details of the target and environment because echoes contain different cues across the spectrum. So, a constant-frequency call has a steady pitch for tracking, while a frequency-modulated call changes pitch to provide detailed information about the target and surroundings. The other statements misstate the roles or imply identical pitch and purpose, which isn’t how these two types function.

In echolocation, two pitch strategies are used: constant-frequency calls and frequency-modulated calls. A constant-frequency call stays at roughly one pitch for a longer time, which lets the bat pick up small shifts in the returning echo’s frequency as the target moves. That Doppler-shift information is ideal for tracking updating on a moving target’s speed and position.

A frequency-modulated call sweeps through a range of pitches during the call. This broad sweep provides rich, high-resolution information about distance and the details of the target and environment because echoes contain different cues across the spectrum.

So, a constant-frequency call has a steady pitch for tracking, while a frequency-modulated call changes pitch to provide detailed information about the target and surroundings. The other statements misstate the roles or imply identical pitch and purpose, which isn’t how these two types function.