Multiple choice

The Galton whistle heard by the dogs, produces which kind of vibrations?

  1. Subsonic vibrations

  2. Supersonic vibrations

  3. Sonic vibrations

  4. Ultrasonic vibrations

  5. Infrasonic vibrations

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The Galton whistle produces ultrasonic vibrations which can be heard only by the dogs.