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Which of the following characteristics of sound is measured in hertz (Hz)?

Which of the following characteristics of sound is measured in hertz (Hz)? Correct Answer Frequency of the sound

The correct answer is Frequency of the sound.

Key Points

  • Frequency of the sound characteristics of sound is measured in hertz (Hz). 
    • When sound travels through air, the atmospheric pressure varies periodically.
      • The number of pressure variations per second is called the frequency of sound,
    • Sound wave frequencies can be measured with a frequency counter or with a spectrum analyzer.
    • These devices work by using a microphone to convert the sound wave into an electrical signal.
    • The peaks and valleys of the wave are counted to find the frequency.

Additional Information

  • The intensity of the sound :
    • Sound intensity, also known as acoustic intensity, is defined as the power carried by sound waves per unit area in a direction perpendicular to that area.
    • The SI unit of intensity, which includes sound intensity, is the watt per square meter (W/m2).
    •  Sound intensity is not the same physical quantity as sound pressure.
  • The loudness of the sound :
    • Loudness refers to how loud or soft a sound seems to a listener.
    • The loudness of sound is determined, in turn, by the intensity of the sound waves.
    • Intensity is a measure of the amount of energy in sound waves.
    • The unit of intensity is the decibel (dB).
  • The wavelength of the sound :
    • The wavelength of a sound, therefore, is the distance between adjacent identical parts of a sound wave.
    • Just as the distance between adjacent crests in a transverse wave is one wavelength.
    • the distance between adjacent compressions in a sound wave is also one wavelength,

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