Terms & Definitions - Module 20
Match the following definitions (or descriptions) to the terms listed below them.
The correct answer is indicated by the "==========".
  1. A longitudinal wave travels in a material and creates a local condensed region with higher pressure.
    1. Infrasonic
    2. Ultrasonic
    3. Compression ==========
    4. Rarefaction
    5. Forced vibration
    6. Natural frequency
    7. Resonance
    8. Beats
    9. Carrier wave
    10. Modulation
    11. Amplitude Modulation
    12. Frequency Modulation

  2. A sound whose frequency is too low for humans to hear.
    1. Infrasonic ==========
    2. Ultrasonic
    3. Compression
    4. Rarefaction
    5. Forced vibration
    6. Natural frequency
    7. Resonance
    8. Beats
    9. Carrier wave
    10. Modulation
    11. Amplitude Modulation
    12. Frequency Modulation

  3. A sound whose frequency is too high for humans to hear.
    1. Infrasonic
    2. Ultrasonic ==========
    3. Compression
    4. Rarefaction
    5. Forced vibration
    6. Natural frequency
    7. Resonance
    8. Beats
    9. Carrier wave
    10. Modulation
    11. Amplitude Modulation
    12. Frequency Modulation

  4. An oscillating force sets up vibrations in a material.
    1. Infrasonic
    2. Ultrasonic
    3. Compression
    4. Rarefaction
    5. Forced vibration ==========
    6. Natural frequency
    7. Resonance
    8. Beats
    9. Carrier wave
    10. Modulation
    11. Amplitude Modulation
    12. Frequency Modulation

  5. A longitudinal wave travels in a material and creates a local region with lowered pressure.
    1. Infrasonic
    2. Ultrasonic
    3. Compression
    4. Rarefaction ==========
    5. Forced vibration
    6. Natural frequency
    7. Resonance
    8. Beats
    9. Carrier wave
    10. Modulation
    11. Amplitude Modulation
    12. Frequency Modulation

  6. An input signal is used to change the frequency of a carrier wave. The carrier wave now has regions of higher frequency and regions of lower frequency.
    1. Infrasonic
    2. Ultrasonic
    3. Compression
    4. Rarefaction
    5. Forced vibration
    6. Natural frequency
    7. Resonance
    8. Beats
    9. Carrier wave
    10. Modulation
    11. Amplitude Modulation
    12. Frequency Modulation ==========

  7. Two sound waves of slightly different frequencies interfere and cause a throbbing effect.
    1. Infrasonic
    2. Ultrasonic
    3. Compression
    4. Rarefaction
    5. Forced vibration
    6. Natural frequency
    7. Resonance
    8. Beats ==========
    9. Carrier wave
    10. Modulation
    11. Amplitude Modulation
    12. Frequency Modulation

  8. When the frequency of an oscillating force matches the natural frequency of the elastic body on which the force is applied, we have...
    1. Infrasonic
    2. Ultrasonic
    3. Compression
    4. Rarefaction
    5. Forced vibration
    6. Natural frequency
    7. Resonance ==========
    8. Beats
    9. Carrier wave
    10. Modulation
    11. Amplitude Modulation
    12. Frequency Modulation

  9. An input signal is used to change the amplitude of a carrier wave. The carrier wave now has regions of higher frequency and regions of lower frequency.
    1. Infrasonic
    2. Ultrasonic
    3. Compression
    4. Rarefaction
    5. Forced vibration
    6. Natural frequency
    7. Resonance
    8. Beats
    9. Carrier wave
    10. Modulation
    11. Amplitude Modulation ==========
    12. Frequency Modulation

  10. A wave which is used as the base to carry a signal.
    1. Infrasonic
    2. Ultrasonic
    3. Compression
    4. Rarefaction
    5. Forced vibration
    6. Natural frequency
    7. Resonance
    8. Beats
    9. Carrier wave ==========
    10. Modulation
    11. Amplitude Modulation
    12. Frequency Modulation

  11. A force is applied to an elastic object and the force is then removed. The object now oscillates at a certain frequency.
    1. Infrasonic
    2. Ultrasonic
    3. Compression
    4. Rarefaction
    5. Forced vibration
    6. Natural frequency ==========
    7. Resonance
    8. Beats
    9. Carrier wave
    10. Modulation
    11. Amplitude Modulation
    12. Frequency Modulation

  12. A process in which a lower frequency signal wave is impressed onto a higher frequency carrier wave.
    1. Infrasonic
    2. Ultrasonic
    3. Compression
    4. Rarefaction
    5. Forced vibration
    6. Natural frequency
    7. Resonance
    8. Beats
    9. Carrier wave
    10. Modulation ==========
    11. Amplitude Modulation
    12. Frequency Modulation


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