Reflection of sound

What is the phenomenon called when sound waves bounce back after hitting a barrier?

• Sound diffusion

• Sound refraction

• Sound reflection

• Sound absorption

According to the law of reflection, what is true about the angles of incidence and reflection?

• Angle of Incidence + Angle of Reflection = 90 degrees

• Angle of Incidence < Angle of Reflection

• Angle of Incidence > Angle of Reflection

• Angle of Incidence = Angle of Reflection

Which of the following statements about echoes is accurate?

• Echoes are always louder than the original sound.

• Echoes are a specific type of sound reflection that returns to the listener.

• Echoes are caused by sound waves that do not reflect.

• Echoes can only occur in large open areas.

What condition must be met for an echo to be heard distinctly?

• The sound must be loud enough

• The reflecting surface must be at least 10 meters away

• The reflecting surface must be at least 17 meters away

• The sound must be produced in a quiet environment

How does reverberation differ from an echo?

• Reverberation is a single reflection, while an echo is a series of reflections.

• Reverberation is only heard in music venues, while an echo can be heard anywhere.

• Reverberation occurs in open spaces, while an echo occurs in enclosed spaces.

• Reverberation is the persistence of sound after the original sound has stopped, while an echo is a distinct return of sound.

What role does sound reflection play in sonar technology?

• It helps to amplify sound waves.

• It allows sound waves to travel faster.

• It reduces background noise in underwater environments.

• It enables detection of objects underwater by reflecting sound waves.

Which of the following is a practical application of sound reflection in architecture?

• Installing loudspeakers in every corner

• Designing concert halls to optimize acoustics

• Using soft materials to absorb sound

• Creating soundproof rooms

How does medical ultrasound utilize sound reflection?

• It uses low-frequency sound waves to create images.

• It relies on sound waves that reflect off internal body structures.

• It uses sound waves to measure temperature.

• It amplifies sound waves to improve clarity.

What happens to sound in a room with hard surfaces compared to one with soft surfaces?

• Sound is absorbed more in hard surfaces.

• Hard surfaces create more reverberation than soft surfaces.

• Soft surfaces amplify sound more effectively.

• Sound travels faster in soft surfaces.

In which scenario would you expect to hear more reverberation?

• Whispering in a library

• Talking in a bathroom with tiles

• Listening to music in a quiet park

• Speaking in a carpeted room