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EFFECTS OF AGE AND HEARING LOSS ON RECOGNITION OF
TIME-COMPRESSED SPEECH J.J. Barajas (1,2,3), F. Zenker (1,3), A.B. Carballo González (3)
and R. Fernández Belda (1,3)
(1) Clinica Barajas, (2) Universidad de La Laguna, (3) Fundación Dr. Barajas
SANTA CRUZ DE TENERIFE - CANARY ISLANDS - SPAIN
Universidad de La Laguna
IAPA 2010 Symposium 19-22 September, Krakow, Poland
Facts About Speech Communication
Normal Conversational Rate: 140 to 180 words per minute (wpm)TV newsreades can easily exceed 210 wpm
Is = Sampling interval Id = Discard interval
Time Compression Ratio: Rc = [Id / (Id + Is)]
1 2 3 4 5 6 7 8
1 3 5 7
Is Id
Compression
Ratio
(%)
Sampling
Interval
(msec)
Discard
Interval
(msec)
0 0 0
50 18.0 18
60 12.0 18
70 7.7 18
Time-Compressed Speech Test
Cárdenas de, M.R. y Marrero V. (1994). “Cuaderno de Logoaudiometría” Cuadernos de la Universidad Nacional de Educación a Distancia.
Time-Compressed Time-Compressed Speech TestSpeech Test
• 25 Word per list
• 4 list of words (0%, 50%, 60%, 70%)
• Phonetically Balanced Bisyllabic Words
• 40 dB re: Spondee Threshold
• Diotic Testing
/leyes/Waveforms AnalysisWaveforms Analysis
Wideband SpectrogramWideband SpectrogramPitch AnalysisPitch Analysis
/leyes/
0 Hz
5.5 kHz
0% 50% 60% 70%
Wideband SpectrogramWideband SpectrogramFormant Strucuture AnalysisFormant Strucuture Analysis
0 Hz
5.5 kHz
0% 50% 60% 70%
/leyes/
SubjetcsSubjetcs
73 Subjects WR >80%73 Subjects WR >80%
Age: Age: 18-78 years old. 18-78 years old.
Group 1 (N= 26): Normal Hearing (NH).Group 1 (N= 26): Normal Hearing (NH). Group 2 (N=20): Flat Hearing Loss Group 2 (N=20): Flat Hearing Loss
(FHL).(FHL). Group 3 (N=15): High Frequency Group 3 (N=15): High Frequency
Hearing Loss (HFL).Hearing Loss (HFL). Group 4 (N=12): Hearing Aid (HA).Group 4 (N=12): Hearing Aid (HA).
RESULTSRESULTS
Overall Time-Compressed Speech Overall Time-Compressed Speech Performance by Group (n=73)Performance by Group (n=73)
CO
RR
EC
T R
EC
OG
NIT
ION
(%
)
NH FHL HFHL HA Normal Hearing
Flat Hearing Loss
High Frequency Hearing Loss
Hearing Aids
NH FHL HFHL HA
Time-Compressed Speech Time-Compressed Speech Performance by Compression Performance by Compression
Ratio and Hearing GroupRatio and Hearing Group
0% Compression 50% Compression
60% Compression 70% Compression
Co
rrec
t R
eco
gn
itio
n (
%)
NH FHL HFHL HA
Co
rrec
t R
eco
gn
itio
n (
%)
PTA in dB HL
0% Compression 50% Compression
60% Compression 70% Compression
Regression Analyses Regression Analyses
Co
rre
ct
Re
cog
nit
ion
(%
)
Age in Years
0% Compression
Percent correct recognition as Percent correct recognition as a function of age group and a function of age group and
compression ratecompression rate
Co
rre
ct
Re
cog
nit
ion
(%
)
Age in Years
0% Compression
50% Compression
Percent correct recognition as Percent correct recognition as a function of age group and a function of age group and
compression ratecompression rate
Co
rre
ct
Re
cog
nit
ion
(%
)
Age in Years
0% Compression
50% Compression
60% Compression
Percent correct recognition as Percent correct recognition as a function of age group and a function of age group and
compression ratecompression rate
Co
rre
ct
Re
cog
nit
ion
(%
)
Age in Years
0% Compression
50% Compression
60% Compression
70% Compression
Percent correct recognition as Percent correct recognition as a function of age group and a function of age group and
compression ratecompression rate
Percentage Recognition as a Percentage Recognition as a Function of Age Group and Function of Age Group and
Pure Tone Audiometry Pure Tone Audiometry 0% Compression 50% Compression
60% Compression 70% Compression
In all subjects recognition performance In all subjects recognition performance decreased with the difficulties of the decreased with the difficulties of the task, age and hearing loss.task, age and hearing loss.
Temporal processing is affected in Temporal processing is affected in individuals with flat hearing loss and individuals with flat hearing loss and hearing aids users.hearing aids users. Audibility provided by Hearing Aids is Audibility provided by Hearing Aids is
independent of Temporal Processing independent of Temporal Processing Mechanism.Mechanism.
The clinical use of this test requiere to The clinical use of this test requiere to take in account the age, type and take in account the age, type and degree of the hearing loss.degree of the hearing loss.
CONCLUSIONSCONCLUSIONS
THANK YOUTHANK YOU
(1) Clínica Barajas (2) Fundación Canaria Dr. Barajas para la Prevención e Investigación de la Sordera (3) CREDA Jordi Perelló (4) Universidad de La Laguna
SANTA CRUZ DE TENERIFE - CANARY ISLANDS - SPAINSANTA CRUZ DE TENERIFE - CANARY ISLANDS - SPAIN
Universidad de La Laguna
EFFECTS OF AGE AND HEARING LOSS EFFECTS OF AGE AND HEARING LOSS ON RECOGNITION OF ON RECOGNITION OF
TIME-COMPRESSED SPEECHTIME-COMPRESSED SPEECH J.J. Barajas (1,2,3), F. Zenker (1,3), A.B. Carballo González (3)
and R. Fernández Belda (1,3)
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