The Human Ear
The Human Ear
How our Ears catch sound: We have just learnt how sound vibrations from a source propagate through the air and reach out ears. Let us now discuss how our ears actually ‘hear’ these sound vibrations. The ear can be broadly classified into three parts: the outer ear, the middle ear, and the inner ear.
Outer ear: The part of the outer ear that is visible to us is called pinna. The sound collected passes through auditary canal. At the end of auditory canal there is a thin membrane called the ear drum or tympanic membrane. When compression of medium produced due to vibration of the object reaches the ear drum, the pressure on the outside of the membrane increases and forces the ear drum inwards.
Middle ear: The middle ear is the cavity with three important ear bones. The moddle ear transmits the amplified pressure variations recieved from the sound wave to the inner ear.
Inner ear: In the inner ear, the pressure variations are turned into electrical signals by the chochlea. These electrical signals are than sent to the brain via the auditory nerve, and the barin interprets them as sound.
Which of the following are correct : (a) Auditory canal is a part of middle ear. (b) The outer ear is the cavity with three important ear bones. (c) The middle ear is the cavity with three important ear bones. | |||
| Right Option : C | |||
| View Explanation | |||
Identify the characteristic of a sound _________________ | |||
| Right Option : D | |||
| View Explanation | |||
For human ears, the audible range is ____________Hz to _______________Hz. | |||
| Right Option : C | |||
| View Explanation | |||
Students / Parents Reviews [10]
Abhyas is a complete education Institute. Here extreme care is taken by teacher with the help of regular exam. Extra classes also conducted by the institute, if the student is weak.
Om Umang
10thA marvelous experience with Abhyas. I am glad to share that my ward has achieved more than enough at the Ambala ABHYAS centre. Years have passed on and more and more he has gained. May the centre flourish and develop day by day by the grace of God.
Archit Segal
7thMy experience with Abhyas is very good. I have learnt many things here like vedic maths and reasoning also. Teachers here first take our doubts and then there are assignments to verify our weak points.
Shivam Rana
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Prisha Gupta
8thIt was a good experience with Abhyas Academy. I even faced problems in starting but slowly and steadily overcomed. Especially reasoning classes helped me a lot.
Cheshta
10thMy experience with Abhyas academy is very good. I did not think that my every subject coming here will be so strong. The main thing is that the online tests had made me learn here more things.
Hiya Gupta
8thAbhyas Methodology is very good. It is based on according to student and each child manages accordingly to its properly. Methodology has improved the abilities of students to shine them in future.
Manish Kumar
10thOne of the best institutes to develope a child interest in studies.Provides SST and English knowledge also unlike other institutes. Teachers are co operative and friendly online tests andPPT develope practical knowledge also.
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10thIt has a great methodology. Students here can get analysis to their test quickly.We can learn easily through PPTs and the testing methods are good. We know that where we have to practice
Barkha Arora
10thAbout Abhyas metholodology the teachers are very nice and hardworking toward students.The Centre Head Mrs Anu Sethi is also a brilliant teacher.Abhyas has taught me how to overcome problems and has always taken my doubts and suppoeted me.
