00:01
Hello everyone in this question we are talking about acoustic location and how the workers working here might be affected by the hearing problem.
00:13
So acoustic location is the use of sound to determine the distance and direction of its source or reference.
00:32
Location can be done actively or passively and can take place in gases such as atmosphere, liquid such as water and a solid such as in earth.
00:45
There can be two types of acoustic location.
00:49
One can be active acoustic location.
00:53
This involves the creation of sound in order to produce echo which is an animal.
01:01
To determine the location of the object in question.
01:06
Then the next is the passive acoustic location.
01:11
This involves the detection of sound or vibration that is created by the object being detected, which is then analyzed to determine the location of the object in question.
01:26
These are used in military.
01:30
These are also used in seismic surveys and are used in sonar that is the sound navigation and ranging and this is a technique that uses sound propagation underwater so this is also used to navigate communicate or to detect the other vessels okay and in military it is used in submarines and aircraft and in seismic surveys there is generation of sound waves to measure underground structures these are also used as echo tracer okay these echo tracers is an acoustic locator that was used to determine the presence and position of ship in form noise is the incidence of all the industrial pollutants involving every industry and causing severe hearing loss in every country in the world.
02:38
Occupational hearing loss includes acoustic traumatic injury and noise induced hearing loss and can be defined as a partial or complete hearing loss in one or both ears as the result of one employment exposure to excessive noise is the major avoidable cause of permanent hearing impairment worldwide people who are exposed to noise levels higher than 85 db suffered from nihl nihl is of a sensory neural type involving injury to the inner ear it is and symmetrical usually affecting the higher frequencies and then spreading to the lower frequency...