Acoustics interview questions
Acoustics interview questions
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Total Questions: 25
1. Elements of acoustic, except for?
Correct Answer is : Sound subdivision
2. The repetition of a sound produced by the "reflection of sound waves" from an obstructing surface, loud enough and received late enough to be perceived as distinct from the source?
Correct Answer is : Echo
3. The intensification and prolongation of sound produced by sympathetic vibration?
Correct Answer is : Resonance
4. A driving force in tune with the natural frequency?
Correct Answer is : Resonance
5. Unit of loudness level?
Correct Answer is : Phon
6. Standing waves are produced in 10m long stretched string. If the string vibrates in 5 segments and wave velocity is 20m/s, its frequency is
Correct Answer is : 5Hz
7. If vibrations of a string are to be increased by a factor 2, tension in the string must be made
Correct Answer is : Four times
8. The tension in the piano wire is 10N. What should be the tension in the wire to produce a note of double the frequency?
Correct Answer is : 40N
9. A string in a musical instrument is 50cm long and its fundamental frequency is 800Hz. If a frequency of 1000Hz is to be produced, then required length of string is
Correct Answer is : 40cm
10. The frequency of a tuning fork is 256. It will not resonate with a fork of frequency
Correct Answer is : 738
11. What is the term used to describe the decrease in sound intensity as it travels through a medium?
Correct Answer is : Attenuation is the gradual loss of sound energy as it propagates through a medium.
12. Which parameter is used to quantify the frequency content of a sound signal?
Correct Answer is : Spectrum represents the distribution of frequencies in a sound signal.
13. What is the term for the phenomenon where two sound waves of equal frequency and amplitude result in a cancellation of sound?
Correct Answer is : Interference occurs when two waves combine to create a new wave with a different amplitude.
14. Which of the following materials is known to have the highest acoustic impedance?
Correct Answer is : Steel has a high acoustic impedance due to its density and stiffness.
15. What is the term for the phenomenon where a sound wave changes direction as it passes through a medium with varying density?
Correct Answer is : Refraction occurs when a sound wave bends due to changes in the medium's density.
16. Which of the following properties of a sound wave determines its loudness?
Correct Answer is : Amplitude corresponds to the intensity or loudness of a sound wave.
17. What is the term for the phenomenon where sound waves are reflected off a surface at the same angle they hit it?
Correct Answer is : Reflection is the bouncing back of sound waves off a surface.
18. Which of the following frequencies is typically associated with infrasound?
Correct Answer is : Infrasound refers to sound waves below the human hearing range, typically below 20 Hz.
19. Which type of microphone uses a diaphragm connected to a coil suspended in a magnetic field to convert sound waves into electrical signals?
Correct Answer is : A dynamic microphone operates on the principle of electromagnetic induction to convert sound to electrical signals.
20. What does the term 'soundproofing' refer to in the context of acoustics?
Correct Answer is : Soundproofing aims to reduce the transmission of sound between spaces, preventing it from escaping or entering a room.
21. What is the phenomenon where sound waves cancel each other out called?
Correct Answer is : Interference occurs when sound waves cancel each other out due to phase differences.
22. Which parameter is NOT used to describe the quality of sound?
Correct Answer is : Impedance is a measure of how much a medium resists the flow of sound waves.
23. What property of a material affects the speed of sound through it?
Correct Answer is : The density of a material affects how fast sound can travel through it.
24. Which type of wave does sound propagate as?
Correct Answer is : Sound waves are longitudinal waves where the particles oscillate parallel to the direction of wave propagation.
25. What is the term used to describe the decrease in sound intensity with distance?
Correct Answer is : Attenuation is the reduction in sound intensity as it travels through a medium.
