explain
Sonar
And
structure of human ear
Max words 500
Answers
= The word Sonar stands for .
= >Sonar is a device which is used to find distance direction and speed of Underwater object .
= > Sonar is consisted of a transmitter and a receptor aur detector and installed at the bottom of ship.
=>the transmitter produced and transmit Ultrasonic waves .
=>these waves travel through water and after taking the object on the bottom of seats and reflect back and received by detector.
=> waves are connected into electric signal by detector.
=>the Sonar device measure the time taken by Ultrasonic waves to travel from ship to bottom of sea and back to ship .
= >bats fly in the Dark Knight by a meeting Hai paste ultrasound waves which are reflected from the obstacle or prey and returned to bats ear . The picture of reflection tell the bat where the obstacle or pray is and what it is like .
= >The ear consists of three part outer ear middle ear and inner ear.
= >the year are the sense organ which help us to hearing the sound.
= >The outer ear is called Pinna . It collect the sound from surrounding . this sound passes through the auditorial canal . at the end of auditorial canal is a thin elastic member called ear drum or tympanic membrane .
= >The middle ear contains of three bones: hammer ,anvil and stirrup linked with one another .Free end of hammer touches ear drum and that of stirrup linked with members of oval windows of inner ear .The Lower part of Middle ear has a narrow Eustachian tube .
= >the inner ear has a coiled tube called cochlea , which is connected with oval window , cochlea is filled with a liquid containing nerve cell outer side of Cochlea is connected to auditory nerve which goes to brain .
= >when compression of sound waves strikes the eardrum the pressure on the outside of a drum increase and pushes the eardrum in word while during rarefraction a drum moves out words. ear drum start vibrating back and front.
= > these vibrations are increased by three bones and Middle ear transmitted these amplified pressure variations received from soundwave to inner ear .
=>in the inner ear the pressure variations are turned into electrical signal by the cochlea .
=>These electric signal are sent to the brain we are auditory nerve and the brain interprets them as a sound.
➡️SONAR stands for (So)und (N)avigation (A)nd (R)anging. Because sound travels farther through water, it is an ideal method of detecting the bearings and distances of objects below sea level, by emitting sound pulses and measuring the time lapse and direction of echoes which are reflected back. It works similarly to RADAR which uses radio waves above the sea. These terms are easy to look up if a web browser is available
➡️structure of human ear:
1.OUTER EAR: it consists of pinna and the air tube. At the end of the ear tube, there is a stretched membrane which is called eardrum. The sound waves passes through ear tube to vibrate eardrum.
2.MIDDLE EAR: it has three small bones which are interlinked together and attached to the ear drum and the inner ear.These bones receive vibration through the air drum and pass them to the inner ear.
3.INNER EAR: it consists of a coiled organ of hearing, semicircular canals , which are organs of balance and the auditory nerve. The inner ear receives vibrations from the middle ear and change them to nerve impulse. These impulses reach the brain through the auditory nerves and the brain interprets the impulses and we can hear the sound.
