Hearing test
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Transcript of Hearing test
![Page 1: Hearing test](https://reader033.fdocuments.us/reader033/viewer/2022061210/548cd545b47959672b8b4856/html5/thumbnails/1.jpg)
Hearing TestAUDIOMETRYAUDIOMETRY
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Sound:
Sound is vibration transmitted through a solid, liquid, or gas, composed of frequencies within the range of hearing.
Frequency
Inte
nsit
y
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Loudness is measured in decibels (dB) - this is the force of sound waves against the ear. Here are approximate decibel levels for some everyday sounds:
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Sound waves cause the tympanic membrane (eardrum) to vibrate. Humans can hear sounds waves with frequencies between 20 and 20,000 Hz.
Hearing (Audition)
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Outer Ear Middle Ear Inner Ear
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Pre-Test Protocols
• Otoscopy• Complete test instructions
– “You are going to hear a series of beeping tones. Every time you hear a tone, press the button (raise your hand) as soon as you hear it then quickly release the button. No matter how faint the tone, press the button when you hear it.”
• Remove glasses, hats, large earrings, gum• Proper seating placement
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Earphone Placement
• Remember; “RED ON RIGHT”• Diaphragm centered over ear canal• Headband on top of patients head• Cords draped down patients back• Fit snugly without squeezing
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Type of Test
Air conduction• Outer Ear• Middle ear
Bone Conduction
•Inner Ear
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Graphic AudiogramsGraphic Audiograms
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500 1000 2000 3000 4000 6000
Frequency (Hz)
dB
Hea
ring L
evel
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Degrees of Hearing Loss
Normal Hearing -10 --- 25 dB HL
Mild Hearing Loss 30 --- 45 dB HL
Moderate Hearing Loss 50 --- 65 dB HL
Severe Hearing Loss 70 --- 85 dB HL
Profound Hearing Loss > 90 dB HL
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Audiogram Configurations:Audiogram Configurations: Progressive noise-induced hearing loss
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Write in Your Report
• Intensity & frequency of Sound.
• How can we hear?
• Anatomy of Ear.
• Type of hearing test.
• Example of hearing loss.
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