Term
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Definition
| The level at which a stimulus is barely perceptible. High enough for the subject to be aware of that sound at least 50% of the times it is presented |
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Term
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Definition
| The number of decibels above an average normal threshold for a given signal. The hearing level dial of an audiometer is calibrated in dBHL |
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Term
| Normal Range of Hearing (dBHL) |
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Definition
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Term
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Definition
| Response when no tone is presented often because instructions were unclear or denial of hearing loss |
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Term
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Definition
1. Familiarization
2. Threshold search
- start at 1000hz, 2000, 4000, 8000
- repeat 1000, 500, 250
- 10 down, 5 up |
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Term
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Definition
| The average of the hearing levels at 500, 1000, 2000Hz for each ear |
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Term
| Bone Conduction Frequencies Tested |
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Definition
| 250, 500, 1000, 2000, 4000 |
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Term
| Conduction Hearing Loss Audiogram |
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Definition
| Air conduction loss, bone conduction within normal range, air bone gap is 10dB or greater |
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Term
| Sensorineural Hearing Loss Audiogram |
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Definition
| Loss in both air conduction and bone conduction, air bone gap within 10dB |
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Term
| Mixed Hearing loss Audiogram |
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Definition
| Loss in both air conduction and bone conduction, air bone gap is 10dB or greater |
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Term
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Definition
| Reduced volume of incoming signal, at suprathreshold levels ear acts normally, can usually be treated medically or surgically, configuration is generally flat or low frequency |
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Term
| Sensorineural Hearing Loss |
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Definition
| Reduction in cochlear sensitivity, reduction in frequency resolution, reduction in dynamic range, loss can't be completely over come with amplification, recruitment |
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Term
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Definition
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Term
| Minimal/Slight Degree of Loss |
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Definition
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Term
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Definition
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Term
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Definition
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Term
| Moderately Severe Degree of Loss |
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Definition
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Term
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Definition
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Term
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Definition
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Term
| Low-Frequency Configuration |
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Definition
| Hearing loss is restricted to the low frequency region of the audiogram |
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Term
| High-Frequency Configuration |
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Definition
| Hearing loss is restricted to the high frequency region of the audiogram |
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Term
| Crossover/Contralateralization |
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Definition
| Results when sound presented to one ear through ear phones crosses the head via bone conduction and is perceived by the opposite ear |
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Term
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Definition
| Reduction in sound energy of a signal as it is transmitted by bone conduction from one side of the head to the opposite ear, occurs at 40dB for supraural headphones and 70dB for insert headphones |
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Term
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Definition
| A procedure where noise is place in one ear to keep it occupied while the other ear is being tested |
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Term
| Benefit of Narrow Band Noise in Masking |
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Definition
| Provides maximum masking with minimum sound pressure |
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Term
| Masking for Supra-aural Headphones |
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Definition
| When the PTT of AC in test ear - PT of BC in the non test ear is greater than 40dB |
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Term
| Masking for Insert Headphones |
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Definition
| When the PTT of AC in test ear - PT of BC in the non test ear is greater than 70dB |
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Term
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Definition
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Term
| Acquired/Adventitious Onset |
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Definition
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Term
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Definition
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Term
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Definition
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Term
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Definition
| Of limited duration, often conductive |
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Term
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Definition
| Irreversible, often sensorineural |
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Term
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Definition
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Term
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Definition
| Aperiodic changes in degree, often middle ear infections |
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Term
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Definition
| Average of the best ear frequency at 500, 1000, 2000hz |
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