In echolocation, what is the term for a steady pitch used for tracking?

In echolocation, what is the term for a steady pitch used for tracking?

• A. Frequency modulation
• B. Echolocation
• C. Magnetoreception
• D. Constant frequency

Answer: (D)

In echolocation, a steady, unchanging pitch is used specifically for tracking motion. That steady pitch is called constant frequency. It creates a narrow, stable signal so that tiny Doppler shifts in the echoes—caused by the target’s movement—stand out clearly, letting the listener judge speed and keep the target in view. If the call were changing pitch over time (frequency modulation), it would be better for resolving distance or handling clutter, but not as effective for continuous tracking. The other terms listed relate to different concepts—echolocation is the overall process, magnetoreception is magnetic-field sensing, and frequency modulation describes changing pitch rather than keeping it constant. So the steady pitch used for tracking is constant frequency.

In echolocation, a steady, unchanging pitch is used specifically for tracking motion. That steady pitch is called constant frequency. It creates a narrow, stable signal so that tiny Doppler shifts in the echoes—caused by the target’s movement—stand out clearly, letting the listener judge speed and keep the target in view. If the call were changing pitch over time (frequency modulation), it would be better for resolving distance or handling clutter, but not as effective for continuous tracking. The other terms listed relate to different concepts—echolocation is the overall process, magnetoreception is magnetic-field sensing, and frequency modulation describes changing pitch rather than keeping it constant. So the steady pitch used for tracking is constant frequency.