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Training
Fundamentals

Initial Quiz

Initial quiz of knowledge in the fundamentals of sound.

15 questions

Question 1 of 15

What is the unit of measurement for frequency?

Decibel (dB) Watt (W) Hertz (Hz) Pascal (Pa)

What quantity determines the perceived pitch of a sound?

Amplitude Frequency Phase Speed

What happens when the amplitude of a sound wave increases?

The pitch decreases The speed increases The perceived loudness increases The timbre changes

What is the approximate speed of sound in air at 20 °C?

150 m/s 343 m/s 1.000 m/s 3.000 m/s

What frequency range is audible to the average human ear?

2 Hz – 2.000 Hz 10 Hz – 10.000 Hz 20 Hz – 20.000 Hz 50 Hz – 50.000 Hz

What is sound from a physical point of view?

An electromagnetic radiation An alternating electric current An exclusively psychological phenomenon A mechanical vibration that propagates through a material medium

What type of wave is sound in air?

Longitudinal Standing Transverse Electromagnetic

What unit is used to measure Sound Pressure Level (SPL)?

Hertz (Hz) Volt (V) Pascal (Pa) Decibel (dB)

What phenomenon occurs when two identical waves coincide in phase?

Cancellation Destructive interference Resonance Constructive interference

What is sound pressure?

The electric force of a speaker The speed of sound The power of the amplifier The variation in pressure relative to atmospheric pressure caused by the sound wave

What is wavelength?

The pitch of the sound The distance between two consecutive equivalent points of the wave The duration of the sound The intensity of the sound

What happens when the frequency of a source increases?

The wavelength increases (in the same medium) The speed decreases The wavelength decreases The wave disappears

What phenomenon explains the change in pitch when an ambulance passes by us?

Reverberation Resonance Diffraction Doppler effect

What is a harmonic?

A frequency that is an integer multiple of the fundamental A wave without frequency A frequency lower than the fundamental A random noise

What characteristic differentiates noise from musical sound?

Speed Amplitude Intensity Periodicity of the signal

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