Physics
Grade-8
Easy
Question
What does a hearing-impaired do to hear clearly?
- Try hard to listen to sounds
- Tell people to repeat what they say
- Do not speak to people
- Use hearing aids
Hint:
Hearing aids amplify sound
The correct answer is: Use hearing aids
- Hearing aids make some sounds louder so that a person with hearing loss can listen and communicate.
- Hearing aids work by amplifying sound.
- Therefore, a hearing-impaired should use hearing aids to hear clearly.
- So, the correct option is d.
Related Questions to study
Physics
When an ear drum encounters a sound it ____.
- Compression or high pressure pushes the eardrum inwards.
- Rarefaction or low pressure pulls the eardrum outwards.
When an ear drum encounters a sound it ____.
PhysicsGrade-8
- Compression or high pressure pushes the eardrum inwards.
- Rarefaction or low pressure pulls the eardrum outwards.
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The frequency of vibration of an object is 15000 Hz. A person ____ hear it.
The frequency of vibration of an object is 15000 Hz. A person ____ hear it.
PhysicsGrade-8
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Which of the following is a part of inner ear?
- Cochlea is an important organ for sound perception.
Which of the following is a part of inner ear?
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- Cochlea is an important organ for sound perception.
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The frequency of vibration of an object is 15 Hz. A person ____ hear it.
- Sounds with frequencies below 20Hz are called infrasound.
The frequency of vibration of an object is 15 Hz. A person ____ hear it.
PhysicsGrade-8
- Sounds with frequencies below 20Hz are called infrasound.
Physics
When an ear drum encounters a compression, it ____.
- Rarefactions or low pressure pulls the eardrum outwards.
When an ear drum encounters a compression, it ____.
PhysicsGrade-8
- Rarefactions or low pressure pulls the eardrum outwards.
Physics
Frequency is denoted by _____.
- Wavelength is denoted by λ.
- Pronounced as lambda.
Frequency is denoted by _____.
PhysicsGrade-8
- Wavelength is denoted by λ.
- Pronounced as lambda.
Physics
When the air pressure near the ear drum decreases, it ____.
- Compressions/high pressure pushes the eardrum inwards.
When the air pressure near the ear drum decreases, it ____.
PhysicsGrade-8
- Compressions/high pressure pushes the eardrum inwards.
Physics
The conversion of the amplified pressure vibrations to electrical signals is done by _____.
- Auditory nerve transmits the signals from the internal ear (cochlea) to the brain.
- Ear ossicles amplify the sound.
The conversion of the amplified pressure vibrations to electrical signals is done by _____.
PhysicsGrade-8
- Auditory nerve transmits the signals from the internal ear (cochlea) to the brain.
- Ear ossicles amplify the sound.
Physics
The ear drum receives the sound in the form of ____.
The ear drum receives the sound in the form of ____.
PhysicsGrade-8
Physics
The sounds with frequencies smaller than 20 Hz are called _____.
- Sounds with frequencies 20Hz to 20kHz are called audible frequencies.
- Sounds with frequencies more than 20Khz are called ultrasound.
The sounds with frequencies smaller than 20 Hz are called _____.
PhysicsGrade-8
- Sounds with frequencies 20Hz to 20kHz are called audible frequencies.
- Sounds with frequencies more than 20Khz are called ultrasound.
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The sonar can detect the enemy ship using _________.
The sonar can detect the enemy ship using _________.
PhysicsGrade-8
Physics
Distance can be measured using ___________ .
Distance can be measured using ___________ .
PhysicsGrade-8
Physics
Which of the following amplifies the pressure variations causing the sound?
Which of the following amplifies the pressure variations causing the sound?
PhysicsGrade-8
Physics
If the audible sound frequency increases, then the sound becomes ______.
If the audible sound frequency increases, then the sound becomes ______.
PhysicsGrade-8
Physics
Anvil is a part of ____.
Anvil is a part of ____.
PhysicsGrade-8
