Most Important Diagrams in Class 8 to practice for CBSE Class 8 Science Exam 2024. Simple Human Ear Diagram Class 8 NCERT with Labels Easy Colour Drawing and Explanation.
Human Ear Diagram Class 8 With Labels And Explanation
Human Ear
We know that we need a vibrating body for the production of sound. Can we hear the sound of all vibrating bodies? The fact is that sounds of frequencies less than about 20 vibrations per second (20 Hz) cannot be detected by the human ear. Such sounds are called inaudible. On the higher side, sounds of frequencies higher than about 20,000 vibrations per second (20 kHz) are also not audible to the human ear. Thus, for human ear, the range of audible frequencies is roughly from 20 to 20,000 Hz.
We hear dif ferent types of sounds around us. Is the sound always pleasing? Does a sound sometimes cause discomfort to you? Some sounds
are pleasant to the ear, whereas some are not. Suppose construction work is going on in your neighbourhood. Are the sounds coming from the construction site pleasing? Do you enjoy the sounds produced by horns of buses and trucks? Such unpleasant sounds are called noise. In a classroom, if all the students speak together, what would the sound produced be called?
On the other hand you enjoy sounds from musical instruments. Musical sound is one which is pleasing to the ear. Sound produced by a harmonium is a musical sound. The string of a sitar also gives out a musical sound. But, if a musical sound becomes too loud, would it remain melodious?
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