josé juan barajas de prat clinica barajas, universidad de la laguna, fundación dr. barajas santa...

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José Juan Barajas de Prat Clinica Barajas, Universidad de La Laguna, Fundación Dr. Barajas SANTA CRUZ DE TENERIFE - CANARY ISLANDS - SPAIN Universidad de La Laguna IAPA 2010 Symposium 19-22 September, Krakow, Poland Loudness and Auditory Steady State Responses

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Page 1: José Juan Barajas de Prat Clinica Barajas, Universidad de La Laguna, Fundación Dr. Barajas SANTA CRUZ DE TENERIFE - CANARY ISLANDS - SPAIN Universidad

José Juan Barajas de Prat

Clinica Barajas, Universidad de La Laguna, Fundación Dr. Barajas

SANTA CRUZ DE TENERIFE - CANARY ISLANDS - SPAIN

Universidad de La Laguna

IAPA 2010 Symposium 19-22 September, Krakow, Poland

Loudness and Auditory Steady State Responses

Page 2: José Juan Barajas de Prat Clinica Barajas, Universidad de La Laguna, Fundación Dr. Barajas SANTA CRUZ DE TENERIFE - CANARY ISLANDS - SPAIN Universidad

CATEGORICAL CATEGORICAL LOUDNESS SCALINGLOUDNESS SCALING

Page 3: José Juan Barajas de Prat Clinica Barajas, Universidad de La Laguna, Fundación Dr. Barajas SANTA CRUZ DE TENERIFE - CANARY ISLANDS - SPAIN Universidad

AUDITORY BRAINSTEMAUDITORY BRAINSTEM RESPONSESRESPONSES

Page 4: José Juan Barajas de Prat Clinica Barajas, Universidad de La Laguna, Fundación Dr. Barajas SANTA CRUZ DE TENERIFE - CANARY ISLANDS - SPAIN Universidad

Serpanos (1997)

Relationship between Loudness Relationship between Loudness Intensity Functions and the Click-Intensity Functions and the Click-

ABR Wave V LatencyABR Wave V Latency

Page 5: José Juan Barajas de Prat Clinica Barajas, Universidad de La Laguna, Fundación Dr. Barajas SANTA CRUZ DE TENERIFE - CANARY ISLANDS - SPAIN Universidad

Frequency SpecificFrequency Specific

Fast Fast

Objective Objective

AUDITORY STEADY-STATEAUDITORY STEADY-STATE

RESPONSESRESPONSES

Page 6: José Juan Barajas de Prat Clinica Barajas, Universidad de La Laguna, Fundación Dr. Barajas SANTA CRUZ DE TENERIFE - CANARY ISLANDS - SPAIN Universidad

Acoustic Stimuli: AM Tones.5, 1, 2 & 4 Khz.70 dB nHL - Threshold

ASSRs RECORDING ASSRs RECORDING PROCEDUREPROCEDURE

Amplifier: Low Cut: 20 HzHigh Cut: 300 HzGain: 100 000Notch: On

Electrode Arrangement: Non-inverted: CzInverted:1MGround: forehead

Impedance < 5k

Page 7: José Juan Barajas de Prat Clinica Barajas, Universidad de La Laguna, Fundación Dr. Barajas SANTA CRUZ DE TENERIFE - CANARY ISLANDS - SPAIN Universidad

CONTOUR TESTCONTOUR TESTLOUDNESS CATEGORIES

7. 7. Uncomfortably LoudUncomfortably Loud

6. Loud, but O.K.6. Loud, but O.K.

5. Comfortable, but Slightly Loud5. Comfortable, but Slightly Loud

4. Comfortable4. Comfortable

3. Comfortable, but Slightly Soft3. Comfortable, but Slightly Soft

2. Soft2. Soft

1. Very Soft1. Very Soft

Cox, Robyn M.; Alexander, Genevieve C.; Taylor, Izel M.; Gray, Ginger A. Cox, Robyn M.; Alexander, Genevieve C.; Taylor, Izel M.; Gray, Ginger A. The The Contour Test of Loudness PerceptionContour Test of Loudness Perception. Ear & Hearing: Volumen 18(5) . Ear & Hearing: Volumen 18(5) October 1997 pp388-400.October 1997 pp388-400.

Page 8: José Juan Barajas de Prat Clinica Barajas, Universidad de La Laguna, Fundación Dr. Barajas SANTA CRUZ DE TENERIFE - CANARY ISLANDS - SPAIN Universidad

ASSR Recordings Loudness Growth Function

Page 9: José Juan Barajas de Prat Clinica Barajas, Universidad de La Laguna, Fundación Dr. Barajas SANTA CRUZ DE TENERIFE - CANARY ISLANDS - SPAIN Universidad

500 Hz

1000 Hz

2000 Hz

4000 Hz

Intensity (dB HL)

Lo

ud

nes

s C

ateg

ory

Loudness Growth Loudness Growth FunctionFunction

Page 10: José Juan Barajas de Prat Clinica Barajas, Universidad de La Laguna, Fundación Dr. Barajas SANTA CRUZ DE TENERIFE - CANARY ISLANDS - SPAIN Universidad

Am

pli

tud

e (n

V)

Intensity (dB HL)

ASSR Amplitude-Intensity ASSR Amplitude-Intensity functionfunction

Page 11: José Juan Barajas de Prat Clinica Barajas, Universidad de La Laguna, Fundación Dr. Barajas SANTA CRUZ DE TENERIFE - CANARY ISLANDS - SPAIN Universidad

Am

pli

tud

e (n

V)

Intensity (dB HL)

ASSR Amplitude-Intensity ASSR Amplitude-Intensity functionfunction

500 Hz

Page 12: José Juan Barajas de Prat Clinica Barajas, Universidad de La Laguna, Fundación Dr. Barajas SANTA CRUZ DE TENERIFE - CANARY ISLANDS - SPAIN Universidad

Am

pli

tud

e (u

V)

Intensity (dB HL)

ASSR Amplitude-Intensity ASSR Amplitude-Intensity functionfunction

500 Hz

1000 Hz

Page 13: José Juan Barajas de Prat Clinica Barajas, Universidad de La Laguna, Fundación Dr. Barajas SANTA CRUZ DE TENERIFE - CANARY ISLANDS - SPAIN Universidad

Am

pli

tud

e (n

V)

Intensity (dB HL)

ASSR Amplitude-Intensity ASSR Amplitude-Intensity functionfunction

1000 Hz

500 Hz

1000 Hz

2000 Hz

Page 14: José Juan Barajas de Prat Clinica Barajas, Universidad de La Laguna, Fundación Dr. Barajas SANTA CRUZ DE TENERIFE - CANARY ISLANDS - SPAIN Universidad

Am

pli

tud

e (n

V)

Intensity (dB HL)

ASSR Amplitude-Intensity ASSR Amplitude-Intensity functionfunction

500 Hz

1000 Hz

2000 Hz

4000 Hz

Page 15: José Juan Barajas de Prat Clinica Barajas, Universidad de La Laguna, Fundación Dr. Barajas SANTA CRUZ DE TENERIFE - CANARY ISLANDS - SPAIN Universidad

Linear regression Linear regression analysisanalysis

.5 kHz.5 kHz 1 kHz1 kHz 2 kHz2 kHz 4 kHz4 kHz TotalTotal

Y InterceptY Intercept 1.86 1.53 1.41 1.42 1.55

SlopeSlope 12.26 32.13 28.07 27.46 24.9

Correlation Correlation coefficient (R)coefficient (R)

0.47** 0.45** 0.52** 0.68** 0.49**

Standard error Standard error

of estimateof estimate

1.54 1.47 1.52 1.39 1.48

** P < 0.0001** P < 0.0001

Loudness (fo) = 1.55 + 24.9 * Amplitude

Page 16: José Juan Barajas de Prat Clinica Barajas, Universidad de La Laguna, Fundación Dr. Barajas SANTA CRUZ DE TENERIFE - CANARY ISLANDS - SPAIN Universidad

PREDICTION OF LOUDNESS GROWTH FUNCTION FROM THE ASSR

Predicted Loudness (fo) = B0 + B1 * Intensity + B2 * Amplitude

Y = 0.75X0.4

Zenker Castro, Franz, Juan Barajas de Prat, Jose and Larumbe Zabala, Eneko (2008). Loudness and auditory steady-state responses in normal-hearing subjects. International Journal of Audiology, 47:5, 269 — 275.

Page 17: José Juan Barajas de Prat Clinica Barajas, Universidad de La Laguna, Fundación Dr. Barajas SANTA CRUZ DE TENERIFE - CANARY ISLANDS - SPAIN Universidad

Unconfortable Loudness Level

Page 18: José Juan Barajas de Prat Clinica Barajas, Universidad de La Laguna, Fundación Dr. Barajas SANTA CRUZ DE TENERIFE - CANARY ISLANDS - SPAIN Universidad

Unconfortable Loudness Level Objective estimation

Kiessling, Audiology, 1980 Thornton, Scand Audiol, 1989

Acoustic Reflex Auditory Brainstem Response

Page 19: José Juan Barajas de Prat Clinica Barajas, Universidad de La Laguna, Fundación Dr. Barajas SANTA CRUZ DE TENERIFE - CANARY ISLANDS - SPAIN Universidad

ULLs Measurement Procedure

500 Hz 3 kHz

Acoustical Spectrum

Electrical Waveform

500 Hz 3 kHz

Page 20: José Juan Barajas de Prat Clinica Barajas, Universidad de La Laguna, Fundación Dr. Barajas SANTA CRUZ DE TENERIFE - CANARY ISLANDS - SPAIN Universidad

ULL = 90 dB HL

ULL = 90 dB HL

ULL 500 Hz

Right ear

Left ear

ASSR Recordings

Page 21: José Juan Barajas de Prat Clinica Barajas, Universidad de La Laguna, Fundación Dr. Barajas SANTA CRUZ DE TENERIFE - CANARY ISLANDS - SPAIN Universidad

500 Hz Amplitud-Intensity function (n = 8)

Page 22: José Juan Barajas de Prat Clinica Barajas, Universidad de La Laguna, Fundación Dr. Barajas SANTA CRUZ DE TENERIFE - CANARY ISLANDS - SPAIN Universidad

3 kHz Amplitud-Intensity function (n = 8)

Page 23: José Juan Barajas de Prat Clinica Barajas, Universidad de La Laguna, Fundación Dr. Barajas SANTA CRUZ DE TENERIFE - CANARY ISLANDS - SPAIN Universidad

Inter subject average amplitude-intensity function (n = 8)

Page 24: José Juan Barajas de Prat Clinica Barajas, Universidad de La Laguna, Fundación Dr. Barajas SANTA CRUZ DE TENERIFE - CANARY ISLANDS - SPAIN Universidad

Conclusions

• High intersubject variabilty in the amplitude-intensity function was found.

• ULL prediction based solely on individual ASSR amplitude-intensity function proved to be problematic.

Page 25: José Juan Barajas de Prat Clinica Barajas, Universidad de La Laguna, Fundación Dr. Barajas SANTA CRUZ DE TENERIFE - CANARY ISLANDS - SPAIN Universidad

THANK YOUTHANK YOU

Universidad de La Laguna

Loudness and Loudness and Auditory Steady State Auditory Steady State

ResponsesResponsesJosé Juan Barajas de Prat

Clinica Barajas, Universidad de La Laguna, Fundación Dr. Barajas

SANTA CRUZ DE TENERIFE - CANARY ISLANDS - SPAIN