Audiometric Configurations in Children Andrea Pittman, Ph.D. Arizona State University.

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Presentation transcript:

Audiometric Configurations in Children Andrea Pittman, Ph.D. Arizona State University

Method Groups –6-year-old children –60-year-old adults Audiogram Selection Criteria –Right ear thresholds only –Thresholds for each octave test frequency ( Hz) –At least one threshold > 30 dB HL –Confirmed sensorinueral hearing loss by bone conduction audiometry –Air-bone gaps < 10 dB

Method Core Set of Audiograms –227 children –248 adults Analyses –Configuration –Asymmetry –Progression

*Transducer Effects Frequency (Hz) Hearing Level (dB)

*Transducer Effects NBS 9A Coupler TDH Series Earphone Mic 6cm 3

*Transducer Effects ER 3A Mic 2cm 3 Mic 6cm 3 Mic Frequency (Hz) Hearing Level (dB)

All Audiograms Adults (n=248)Children (n=227)

All Audiograms Adults (n=248)Children (n=227)

All Audiograms Adults (n=248)Children (n=227)

All Audiograms Adults (n=248)Children (n=227)

All Audiograms Adults (n=248)Children (n=227)

Audiometric Classification SlopingRisingFlat U-ShapedTent-ShapedOther Hearing Level (dB) Frequency (Hz)

SlopingRisingFlat U-ShapedTent-ShapedOther Hearing Level (dB) Frequency (Hz) Results (Mean) Adults Children

SlopingRisingFlat U-ShapedTent-ShapedOther Hearing Level (dB) Frequency (Hz) Results (Mean) Adults Children

SlopingRisingFlat U-ShapedTent-ShapedOther Hearing Level (dB) Frequency (Hz) Results (Mean) Adults Children

SlopingRisingFlat U-ShapedTent-ShapedOther Hearing Level (dB) Frequency (Hz) Results (Mean) Adults Children

Hearing Level (dB) Frequency (Hz) SlopingRisingFlat U-ShapedTent-ShapedOther Adults Children Results (SD) +1SD

Hearing Level (dB) Frequency (Hz) SlopingRising U-ShapedTent-ShapedOther Adults Children Results (SD)

Hearing Level (dB) Frequency (Hz) SlopingRisingFlat U-ShapedTent-ShapedOther Adults Children Results (SD)

SlopingRisingFlat U-ShapedTent-ShapedOther Hearing Level (dB) Frequency (Hz) Results (SD) Adults Children

Distribution of Configurations Percent of Audiograms Category

Sloping RisingFlat U-Shaped Tent-ShapedOther Hearing Level (dB) Frequency (Hz) *Sloping Losses Adults Children

*Sloping Losses Adults Children Hearing Level (dB) Frequency (Hz)

*Sloping Losses Adults Children Hearing Level (dB) Frequency (Hz)

*Sloping Losses Adults Children

Asymmetry

AdultsChildren 4000 Hz Right-ear Threshold Left-ear Threshold

*Binaural Fitting Strategies Frequency (Hz) Hearing Level (dB)

Progression Frequency (Hz) Hearing Level (dB) Baseline Audiogram (6-yr-old)Subsequent Audiogram

Progression Age at Subsequent Audiogram (years) Change in Threshold (dB)

Progression Change in Threshold (dB) Number of Thresholds

Summary Configuration –Children had a wider variety of audiometric configurations Asymmetry –More children had asymmetric losses and those asymmetries were more severe Progression/Fluctuation –Thresholds increased and decreased on subsequent audiograms

Frequency (Hz) Hearing Level (dB) The End