- Which device uses multiple reflections of sound to amplify a person’s heartbeat?
- Answer: Stethoscope
- Explanation: A stethoscope uses multiple reflections of sound to direct the heartbeat sound clearly to a doctor’s ears.
- Which instrument uses multiple reflections of sound to project sound in one direction?
- Answer: Megaphone
- Explanation: Megaphones are designed to direct sound waves using multiple reflections, preventing them from spreading in all directions.
- Which musical instruments use multiple sound reflections to amplify sound?
- Answer: Trumpet
- Explanation: Instruments like trumpets and shehanais use a conical shape to reflect sound waves efficiently toward the audience.
- What type of ceiling design in auditoriums helps distribute sound evenly?
- Answer: Curved
- Explanation: Curved ceilings in concert halls help reflect and distribute sound waves evenly, enhancing sound quality.
- Which device uses multiple sound reflections to help people with hearing impairments?
- Answer: Hearing aid
- Explanation: Hearing aids amplify sound using multiple reflections inside a small chamber before sending it to the ear.
- What type of board is placed behind a stage to reflect sound evenly in a hall?
- Answer: Soundboard
- Explanation: Soundboards are placed behind speakers in halls to reflect sound effectively across the entire space.
- Which shape of rooms reduces excessive echo while maintaining sound clarity?
- Answer: Oval
- Explanation: Oval-shaped and acoustically designed rooms help reduce excessive reverberation while maintaining sound quality.
- Which part of a loudspeaker is designed to use multiple sound reflections for better output?
- Answer: Horn
- Explanation: Horns in loudspeakers help guide sound waves efficiently using multiple reflections.
- Which mode of communication in animals relies on multiple sound reflections?
- Answer: Echolocation
- Explanation: Bats and dolphins use echolocation, which relies on multiple sound reflections, to detect objects and navigate.
- What is the main advantage of using multiple reflections of sound in architecture?
- Answer: Clarity
- Explanation: Proper use of multiple reflections ensures clear sound in large auditoriums and prevents loss of speech quality.
