Sound Worksheet-9
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Name the unit used to measure the loudness of sound. Also write its symbol.
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Name the characteristic which helps us distinguish between a man's voice and a woman's voice, even, without seeing them.
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How does the pitch of a sound depend on frequency?
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Name the characteristic of sound which depends on
(a) Amplitude, (b) frequency and, (c) waveform.
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Name the characteristic of sound which can distinguish between the 'notes' (musical sounds) played on a flute and a sitar (both the notes having the same pitch and loudness).
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Name the organs of hearing in our body.
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Name that part of ear which vibrates when outside sound falls on it.
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Name the three tiny bones present in the middle part of ear.
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There are three small bones in the middle ear – anvil, hammer and stirrup :
(a) Which of these bones is in touch with ear-drum?
(b) Which of these bones is in touch with oval window?
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What is the function of three tiny bones in the ear?
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Name the tube which connects the middle ear to throat.
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Name the nerve which carries electrical impulses from the cochlea of ear to the brain.
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What is the name of passage in outer ear which carries sound waves to the ear-drum?
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Why should we not put a pin or pencil in our ears?
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What types of scans are used these days to monitor the growth of developing baby in the uterus of the mother?
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How is an ultrasound scan for fetus (unborn baby) better than X-ray?
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What is the name of the device which is used to find the depth of sea (or ocean) by using ultrasonic sound waves?
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Write the full name of 'SONAR'.
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Name the principle on which a soundboard works.
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Name the device which is used to address a small gathering of people.
Answer:
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Pitch
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–
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Timbre
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ear
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eardrum
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anvil, hammer and stirrup
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–
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–
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Eustachian tube
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Auditory nerves
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–
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Because they can tear the ear drum
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Ultrasound scans
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SONAR
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Sound Navigation and Ranging
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Reflection of sound
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Megaphone
