Hearing Lab Tests Rinne Test http www webster

Hearing Lab Tests

Rinne Test • http: //www. webster. edu/~davittdc/ear/rinne. htm • http: //video. about. com/deafness/Hearing. Test. htm

Rinne Test • Hearing is NORMAL: – Air conduction will be heard TWICE as long as bone conduction • Conductive Hearing Impairment: – Bone conduction is heard longer than or equally as long as air conduction

Rinne Test Data Table Left Ear Bone Air Conduction (seconds) Right Ear Bone Air Conduction (seconds)

Speech-in-Noise Test • Sensorineural hearing loss: – Difficult time understanding speech in the presence of background noise. • http: //press. hearit. org/page. dsp? forside=yes&area=1189

Audiogram • One of the most important tests used to assess hearing – Pure Tone Test • Audiometer – Used to measure a subject’s hearing sensitivity • Plays a series of beeps or tones at a distinct frequency – Every time the person hears a beep, the person raises their finger (or pushes a button) – The tone gets softer and softer • The softest sound the person hears is the THRESHOLD for that particular frequency. • Threshold will then be tested for those frequencies ranging from 250 Hz to 8, 000 Hz. – Thresholds are recorded on a graph called AUDIOGRAM

Audiogram • Frequencies on x-axis • Hearing Thresholds on y-axis – In decibels • X=left ear • O=right ear

Hearing Loss • On graph: X and O’s are connected – Keeps track of hearing levels across different pitches • Hearing Loss: – Normal, Mild, Moderately Severe, and Profound

Conductive Hearing Loss and Audiogram • Air conduction levels = X and O’s • Bone conduction levels = < and > • Conductive Hearing Loss – Due to outer and middle ear issues – Represented when bone conduction is AT LEAST 10 decibels better than air conduction • See next slide for examples

Conductive Hearing Loss • Left audiogram = no hearing loss • Right audiogram = conductive hearing loss

Audiogram Website • http: //lloydhearingaid. com/shopping/audiogr am. asp

Hearing Loss Lab • You will conduct the following – Rinne Test • Record results in Rinne Test Table (see slide 4) – Speech-in-noise Test • Record results – Can start new table under Rinne Test Table – Audiogram • Using Logger Pro • Copy and Paste Graphs • Create COLUMN GRAPH in Excel – Comparing your Hearing Results (Series 1) with Minimum Normal Hearing (Series 2) and Maximum Normal Hearing (Series 3) • You should be able to discuss: – Do you have conductive hearing loss? (see slides 11 and 12) – Is your hearing in normal range? (see slide 3 and 8) – Do you have sensorineural hearing loss? (see slide 5) • You will write a lab report INDIVDUALLY!!!! (see Lab Report Hand Out) – Lab Report will be due on Wednesday/Thursday