21. Which of the following is not a type of sound wave interference?
a) Constructive
b) Destructive
c) Diffraction
d) Standing
Answer: c) Diffraction
22. The highest point of a sound wave is called its:
a) Crest
b) Trough
c) Amplitude
d) Wavelength
Answer: a) Crest
23. Which of the following materials would reflect sound waves the most?
a) Soft fabric
b) Concrete wall
c) Wooden door
d) Glass window
Answer: b) Concrete wall
24. The process of converting sound energy into electrical signals is known as:
a) Reflection
b) Refraction
c) Diffraction
d) Transduction
Answer: d) Transduction
25. The phenomenon of sound waves bouncing off multiple surfaces and creating multiple reflections is known as:
a) Refraction
b) Diffraction
c) Reverberation
d) Absorption
Answer: c) Reverberation
