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DSSSB TGT Sound Waves — practice questions

Explore 7 free Sound Waves questions in DSSSB TGT Science. Open each question or exercise to read its content, reference answers and available explanation.

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Sound Waves questions and exercises with answers

Showing questions 1–7 of 7.

The LOUDNESS of a sound depends on the wave's:Read the answer and worked solution →The audible range of frequency for humans is:Read the answer and worked solution →Reverberation refers to:Read the answer and worked solution →SONAR (SOund Navigation And Ranging) uses:Read the answer and worked solution →Which two animals are known to use natural echolocation to navigate and hunt?Read the answer and worked solution →Compression or rarefaction?Read the answer and worked solution →True or false: soundRead the answer and worked solution →

Worked practice questions

The LOUDNESS of a sound depends on the wave's:

  1. Frequency, with higher frequency giving louder sound
  2. Speed, with faster waves being louder
  3. Wavelength, with longer waves being louder
  4. Amplitude, with higher amplitude giving louder sound
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Correct answer: D. Amplitude, with higher amplitude giving louder sound

Loudness depends on the amplitude of the sound wave: higher amplitude = louder sound. Pitch (not loudness) depends on frequency.

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The audible range of frequency for humans is:

  1. 20 Hz to 20,000 Hz
  2. 2 Hz to 2,000 Hz
  3. 200 Hz to 2,00,000 Hz
  4. 20 Hz to 2,000 Hz
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Correct answer: A. 20 Hz to 20,000 Hz

**Human audible range:** 20 Hz to 20,000 Hz. Below 20 Hz = infrasound; above 20,000 Hz = ultrasound.

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Reverberation refers to:

  1. A single distinct echo bouncing from one far wall
  2. Persistence of sound via multiple reflections in a closed space
  3. The bending of sound waves when it enters water from air
  4. The Doppler shift in frequency when the source moves quickly
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Correct answer: B. Persistence of sound via multiple reflections in a closed space

Reverberation is the persistence of sound due to multiple reflections inside a closed space (hall, room). Architects use sound-absorbing materials to control reverberation in cinema halls.

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