Question

3 uses of multiple reflections of sound

Answer 1

1.) Megaphone or loudspeakers, horns, musical instruments such as trumpets and shehanais, r all designed to send sound in a particular direction. In these instruments, a tube followed by a conical opening reflects sound successively to guide most of the sound waves from the source in the forward direction towards the audience.

2.) stethoscope is a medical instrument used for listening to sound produced within the body, chiefly the heart or lungs. In stethoscope, the sound of the patient's heartbeat reaches the doctors ear by multiple reflection of sound.

3.) Generally the ceiling of concert halls, r curved so that sound after reflection reaches all corners of the hall. Sometimes a curved soundboard maybe placed behind the stage so that the sound, after reflecting from the sound board, spreads evenly across the width of the hall.

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Answer 2

1) Megaphones and musical instrumentsà Megaphones or loudhailers, horns, musical instruments are all designed to send sound in a particular direction without spreading it in all directions. In these instruments, a tube followed by a conical opening reflects sounds successively to guide most of the sound waves from the source in the forward direction.

2) Stethoscopeà In stethoscope the sound of a patient's heartbeat is guided by along the tube of the stethoscope to the doctor's ears by multiple reflections of sound.

3) Curved ceilingsà the ceilings of a concert halls, conference halls and cinema halls are made curved so that sound after reflection reaches all the corners of the halls.