Physics
Grade-8
Easy
Question
As we humans grow older, our ears become ______.
- More sensitive to higher frequencies
- Less sensitive to higher frequencies
- Least sensitive to sound
- We become deaf
Hint:
Less sensitive to higher frequencies.
The correct answer is: Less sensitive to higher frequencies
- Hearing sensitivity decreases progressively as humans become older.
- Therefore, as humans grow older, ears become less sensitive to higher frequencies.
- So, the correct option is a.
Related Questions to study
Physics
Elephants use _____ to communicate with each other.
- The infrasound frequencies are good for long distance communication because they travel well through objects instead of being reflected.
Elephants use _____ to communicate with each other.
PhysicsGrade-8
- The infrasound frequencies are good for long distance communication because they travel well through objects instead of being reflected.
Physics
What does a hearing-impaired do to hear clearly?
What does a hearing-impaired do to hear clearly?
PhysicsGrade-8
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.
Physics
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
Physics
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?
PhysicsGrade-8
- Cochlea is an important organ for sound perception.
Physics
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.
Physics
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