Spring, 2010 Maura McGuire

Access Success

Module 1Understanding one’s hearing loss

Spring, 2010 Maura McGuire

Objectives

– Demonstrate understanding of the science of sound and the ear

– Learn to read one’s audiogram– Explain the audiogram– Explain its’ impact on one’s access

to education

Spring, 2010 Maura McGuire

Now Hear This• Take the pretest on Quia• http://www.quia.com/jq/65203.html?AP_ra

nd=617723340

• Watch video: Now Hear This (www.dcmp.org )

• Discuss video • Review slides• Take posttest on Quia.

Spring, 2010 Maura McGuire

Now Hear This

Functions of the ear:• Balance• HearingMajor Part of the ear• Outer ear• Middle ear• Inner earOuter Ear• Pinna• Ear canal• Eardrum

Middle Ear• Hammer, Anvil, Stapes• Oval Window• Eustachian tubesInner Ear• Cochlea

– Organ of Corti

• Auditory nerve• Brain• Balance organs

– Semi circular canals

Spring, 2010 Maura McGuire

Outer EarPart Function

Pinna (auricle) Bring sound into ear and locate sound

Ear canal (external auditory meatus)

Has hairs and wax to keep out dirt and insects

Eardrum (tympanic membrane)

Membrane which is stretched tightly across the ear canal and vibrates when sound hits it.

Spring, 2010 Maura McGuire

Middle EarPart Function

Middle Ear Filled with air

Contains 3 smallest bones in the body: hammer, anvil, stirrup

Malleus, Incus, Stapes

Also known as:

Hammer, anvil, stirrup – smallest bones that vibrate sound

Stapedes Muscle

Pulls bones apart ot keep them from breaking with loud sounds.

Eustachian tube

Helps equalize air pressure and drain mucus

Spring, 2010 Maura McGuire

Inner EarPart FunctionCochlea Size of a pea

Organ of Corti

Hair cells like a pipe organ to send an electrical pitch and loudness info to the auditory nerve

Semi Circular Canals

Organs of balance

Auditory Nerve

Pathway for sound to the brain

Brain Central computer to interpret sound messages from the cochlea

Spring, 2010 Maura McGuire

Reading an Audiogram

Spring, 2010 Maura McGuire

Pretest

• Go to Quia site: Reading an Audiogramhttp://www.quia.com/quiz/1190683.html

• Complete the pretest

Spring, 2010 Maura McGuire

Audiogram Vocabulary

• Audiogram• Hertz• Decibels• Unilateral• Bilateral• Mild• Moderate• Severe• Profound

• Conductive• Sensorineural• Mixed Hearing Loss• Speech discrimination• Speech Reception

Threshold (SRT)• Threshold

Spring, 2010 Maura McGuire

Spring, 2010 Maura McGuire

Spring, 2010 Maura McGuire

Chart Your Thresholds

• Audiogram date ______________

250 Hz 500 Hz 1000 Hz

2000 Hz

4000 Hz

8000 Hz

Right Ear

Left

Ear

FM

Spring, 2010 Maura McGuire

Describe your hearing loss• My loss is described as:

(mild, moderate, severe, profound)(unilateral, bilateral)(conductive, sensorineural, mixed)

• The amount of hearing loss in my right and left ears is: The same/different – (Which ear is better?)

• I get approximately ____ dB benefit from my hearing aids/CI and _______ db benefit from FM amplification.

• My speech discrimination scores are: • right_____ % correct with amplification• Left _____% correct with amplification

My speech discrimination ability could be described as: excellent, good, fair, or poor

Spring, 2010 Maura McGuire

Post test

• Go back to the Quia site

• Reading an Audiogramhttp://www.quia.com/quiz/1190683.html

• Complete the post test

Spring, 2010 Maura McGuire

Explain your hearing loss

• Turn to the person to your right and explain your hearing loss to them. Be sure to include: – Degree of loss– # impacted ears– Type of loss– As well as what that

means to you (what you can/can’t hear)