Term
| Only ___% of audiologists & hearing instrument specialists (HIS) routinely use probe-microphone measures (> ½ the time) |
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Definition
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Term
| Tube placement: __ to __ mm away from the TM to accurately measure response in the high frequencies & avoid a standing wave. |
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Definition
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Term
Tube placement: Insert Tube a Constant Depth
-Insert a constant depth past the ___ ___
-length of adult ear canal =___ mm
-distance between EAM & intertragal notch =___ mm
-For adult males, insert tube ___ mm
-For adult females; insert tube ___ mm
-For children, insert tube __-__ mm
-"___ for anyone who does NOT have an "average adult" ear canal |
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Definition
| intertragal notch; 25; 10; 30; 28; 20-25; MODIFY |
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Term
Common Errors In Probe-Mic Measures:
-excessive ___
-probe tube is pushed into ear canal ___
-HA or EM fits so tightly that it ___ probe-tube
-___ ___ of probe-tube is inadequate or probe-tube ___ during testing |
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Definition
| cerumen; wall; crimps; insertion depth; moves |
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Term
Sources of Variability in Probe- Microphone Measures:
-Change in HA ___ across measures
-Movement of ___ ___ ___ between unaided & aided measures (for REIG)
-Movement of pt’s ___ during or between measures
-Room acoustics –___
-___ of probe tube
-___ noise
-Change in ___ to the HA
-___ of clinician |
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Definition
| placement; probe mic inlet; head; reflections; Deformation; Equipment; level; Carelessness |
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Term
REUR/REUG: Steps to Measure
-___
-Put tube in EAC with marker at ___ ___ & tip within __-__ mm of TM
-Situation patient at correct ___ & ___ from loudspeaker(s)
-Choose ___ level
-Perform the ___ |
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Definition
| Otoscopy; intertragal notch; 5-6; azimuth; distance; input; measurement |
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Term
| When do you measure REUR/REUG? |
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Definition
| You do it in a fitting if you want to measure REIG (real ear insertion gain) |
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Term
REAR/REAG: Steps to Measure
-___
-Put tube in canal with marker at ___ ___ & tip within ___ of TM
-___ the probe-tube & insert the aid
-Turn the aid on set it to ___ gain
-Position the listener at the correct ___ & distance from the loudspeaker(s).
-Choose the ___ level.
-Complete the ___. |
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Definition
| Otoscopy; intertragal notch; 5-6 mm; Hold; user; azimuth; input; measure |
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Term
| ___ ___ verification: place a probe tube, verify hearing aid gain/output in the ear |
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Definition
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Term
| ___ verification: same as real ear verification, but in a coupler with predictions to the real ear. Often used with children |
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Definition
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Term
-Terms that end in "g" for gain are ___ measures. The input used to obtain the response has been subtracted from the absolute ___ level across freqs.
-Terms that end in "r" for response are ___ measures of output in SPL (the input level used to obtain the response is not considered) |
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Definition
| difference; output; absolute |
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Term
| ____________: SPL as a function of freq. at a specified point in the ear canal for a specified sound field with the ear canal unoccluded |
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Definition
| Real-ear unaided response (REUR) |
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Term
| ________: difference in decibels between the SPL as a function of freq., at a specified point in the ear canal & the SPL at the field reference point, for a specified sound field with the ear canal unoccluded |
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Definition
| Real-ear unaided gain (REUG) |
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Term
| _______: Freq. response of a hearing aid (and its acoustic coupling) that is in the "on" position, measured in the ear canal, for a particular input signal. |
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Definition
| Real-ear Aided Response (REAR); |
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Term
| Difference in dB, as a function of frequency, between AG & UG |
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Definition
| Re al-ear Insertion Gain REIG |
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Term
| REAG/REIG values are ___ than coupler gain |
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Definition
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Term
REIG Steps:
-Measure ___
-Measure ___ (using same conditions)
-___-___ = REIG (equipment calculates it)
-___ the aid to get the closest match to target |
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Definition
| REUR; REAR; REAG-REUG; Adjust |
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Term
| The SPL across freqs., measured in the ear canal, with the aid in place and turned off; An REAR with aid OFF |
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Definition
| Re al-Ear Occluded Response REOR |
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Term
| What is the main purpose of REOR? |
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Definition
| To find out about venting characteristics |
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Term
Difference in dB, as a function of freq., between the
SPL at a specified point in the EAC & the SPL in a 2cc
coupler, for a specified input signal; Difference in dB across freqs between the SPL measured in the real ear and in a 2cc coupler, produced by a transducer generating the same input
signal |
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Definition
| Re al-Ear-to-Coupler Difference RECD |
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Term
-RECD are typically ___ (e.g. > 0 dB) Why? ___ output in the ear than the coupler for the same input level (since real ear has smaller volume than 2 cc coupler)
-A negative RECD may suggest an insufficient ___ of the transducer (foam ear tip), a ___ than avg ear, a ___ TM, or present ___ tube |
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Definition
| positive; Greater; seal; larger; perforated; PE |
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Term
| Children have ___ RECDs than adults |
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Definition
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Term
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Definition
| It can predict real-ear output when measuring HAs in a 2cc coupler |
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Term
| Can use RECD to convert audiogram (with inserts) from dB HL to dB ___ |
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Definition
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Term
| For RECD measure the coupler and real-ear and then ___ the stored coupler measure from the real-ear measure |
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Definition
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Term
| Difference in dB, across freqs, between the SPL measured in the real-ear & the audiometer dial setting that produced it |
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Definition
| Real-Ear-to-Dial Difference |
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Term
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Definition
| to convert audiometric data (thresholds & LDLs obtained with supra-aural headphones) in dB HL to dB SPL. Note: RECD is used when audiogram is obtained with insert earphones |
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Term
SPL as a function of freq., at a specified measurement point in the EAC, for a sound field sufficient to operate the aid at its
maximum output level, with the aid (and its acoustic coupling) in place & turned on, with the gain adjusted to full-on or just below feedback; An REAR with an input signal loud enough to
operate the aid at its maximum output level |
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Definition
| Real-Ear Saturation Response (RESR) |
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Term
Why measure RESR?:
-To measure the ___ ___ that the aid delivers to the listener’s ear.
-Can then adjust the maximum output (MPO) of the aid to make sure that amplified signals do not exceed ___.
-Can also see if the aid’s ___ is too low. |
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Definition
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Term
RESR Steps:
-___
-Put tube in canal with marker at ___ notch and tip __-__ mm from TM
-Hold the probe tube & insert the aid (or EM)
-Set the aid to “on” & VC to the ___ position before feedback or to the projected used setting
-Choose an input loud enough (e.g. ___ dB SPL pure tone/warble tone) to operate the aid at its maximum output level
-Do the measurement |
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Definition
| Otoscopy; intertragal; 5-6; highest; 90 |
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Term
AAA best practice document says to do RESR
measures IN THE ___, not the ___ ___ since there is potential for high sound levels in the ear canal. |
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Definition
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