Audiometry Test
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An audiometry test tests your capacity to hear sounds. Sounds fluctuate, in light of their clamor (force) and the speed of sound wave vibrations (tone).
Hearing happens when sound waves invigorate the nerves of the internal ear. The sound then, at that point, makes a trip along nerve pathways to the cerebrum.
Sound waves can venture out to the internal ear through the ear channel, eardrum, and bones of the center ear (air conduction). They can likewise go through the bones around and behind the ear (bone conduction).
The Force of sound is estimated in decibels (dB):
- A murmur is around 20 dB.
- Noisy music (a few shows) is around 80 to 120 dB.
- A fly motor is around 140 to 180 dB.
- Sounds more noteworthy than 85 dB can cause hearing misfortune following a couple of hours. Stronger sounds can cause quick torment, and hearing misfortune can foster in an extremely brief time frame.
- The TONE of sound is estimated in cycles each second (cps) or Hertz (Hz):
- Low bass tones territory around 50 to 60 Hz.
- Deafening, shrill tones territory around 10,000 Hz or higher.
- The ordinary scope of human hearing is around 20 to 20,000 Hz. A few creatures can hear up to 50,000 Hz. Human discourse is generally 500 to 3,000 Hz.
How the Test is Performed
Your medical services supplier might test your hearing with straightforward tests that should be possible in the workplace. These may incorporate finishing a survey and paying attention to murmured voices, tuning forks, or tones from an ear assessment scope.
A particular tuning fork test can assist with deciding the kind of hearing misfortune. The tuning fork is tapped and held in the air on each side of the head to test the capacity to hear via air conduction. It is tapped and set against the bone behind every ear (mastoid issue that remains to be worked out) bone conduction.
A proper hearing testing can give a more precise proportion of hearing. A few tests might be finished:
Unadulterated tone testing (audiogram) - - For this test, you wear headphones connected to the audiometer. Unadulterated tones of a particular recurrence and volume are conveyed to each ear in turn. You are approached to flag when you hear a sound. The base volume expected to hear each tone is diagramed. A gadget called a bone oscillator is set against the mastoid issue that remains to be worked out bone conduction.
Discourse audiometry - This tests your capacity to distinguish and rehash verbally expressed words at various volumes heard through a head set.
Immittance audiometry - This test estimates the capability of the ear drum and the progression of sound through the center ear. A test is embedded into the ear and air is siphoned through it to change the tension inside the ear as tones are delivered. A mouthpiece screens how well sound is led inside the ear under various tensions.
Tympanometry - A proportion of the vibration of the ear drum and center ear pressure.
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