Noise reduction schemes for digital hearing aids and their use for the hearing impaired:
Gespeichert in:
| 1. Verfasser: | |
|---|---|
| Format: | Buch |
| Sprache: | English |
| Veröffentlicht: |
Aachen
Shaker
2001
|
| Schriftenreihe: | Berichte aus der medizinischen Physik
|
| Schlagworte: | |
| Online-Zugang: | Inhaltsverzeichnis |
| Beschreibung: | Zugl.: Oldenburg, Univ., Diss., 2000 |
| Beschreibung: | VII, 132 S. graph. Darst. : 21 cm |
| ISBN: | 3826585135 |
Internformat
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| 245 | 1 | 0 | |a Noise reduction schemes for digital hearing aids and their use for the hearing impaired |c Mark Marzinzik |
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Datensatz im Suchindex
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|---|---|
| adam_text | Contents
1 Introduction 1
2 Speech pause detection 3
2.1 Introduction 3
2.2 Algorithm 7
2.3 Examples 11
2.4 Comparison with G.729 VAD algorithm 16
2.4.1 Procedure 17
2.4.2 Results 18
2.4.3 Discussion 22
2.5 Conclusions 24
3 The Ephraim Malah noise reduction algorithms 25
3.1 Introduction 25
3.2 Literature overview 26
3.2.1 Spectral subtraction 26
3.2.2 HMM based systems 27
3.2.3 Usage of psychoacoustical properties 28
3.2.4 The rediscovery of the Ephraim Malah algorithms . 29
3.3 A closer look at the Ephraim Malah schemes 30
3.3.1 The suppression rule 30
3.3.2 Modifications of the suppression rule 33
3.4 Conclusions 36
4 Listening effort and speech intelligibility 37
4.1 Introduction 37
4.2 Algorithms 39
4.3 Subjects 41
4.4 Measurement setup 42
4.5 Statistical methods 43
4.6 Listening effort 44
4.6.1 Procedure 44
4.6.2 Results 46
I
II CONTENTS
Experiment 1 46
Experiment 2 48
4.6.3 Discussion 49
4.7 Speech intelligibility 51
4.7.1 Procedure 52
4.7.2 Results 53
Experiment 1 53
Experiment 2 55
4.7.3 Discussion 56
4.8 Conclusions 58
5 Subjective quality assessment 59
5.1 Introduction 60
5.2 Algorithms 61
5.3 Subjects 62
5.4 Measurement setup 62
5.5 Procedure 63
5.6 Results 64
5.7 Discussion 72
5.8 Conclusions 74
6 Predicting the quality of noise reduction algorithms 77
6.1 Introduction 78
6.2 Subjective preference data sets 79
6.3 Implementation of objective measures 81
6.4 Correlating subjective data and objective measures 82
6.4.1 Procedure 82
6.4.2 Results 82
6.4.3 Discussion 89
6.4.4 Comparison with literature results 90
6.5 Using objective measures to optimize noise reduction schemes 91
6.5.1 Procedure 91
6.5.2 Results 92
6.5.3 Discussion 93
6.6 Conclusions 94
7 Summary and conclusions 95
Appendix
A Audiograms of the hearing impaired subjects 99
B Fitting Bradley Terry models 100
CONTENTS III
C BT test statistics of Experiments 1 and 2 108
D Objective measures data 111
Notes 115
References 120
List of Figures
2.1 Flowchart of the proposed speech pause detection algorithm . 10
2.2 Waveform of test sentence 12
2.3 Waveform of noisy signal 12
2.4 Power Envelope and speech pauses of test sentence in car noise 13
2.5 Low pass band power envelope and speech pauses of test sen¬
tence in car noise 13
2.6 High pass band power envelope and speech pauses of test sen¬
tence in car noise 14
2.7 Power envelope and speech pauses of test sentence in drill noise 14
2.8 Low pass band power envelope and speech pauses of test sen¬
tence in drill noise 15
2.9 High pass band power envelope and speech pauses of test sen¬
tence in drill noise 15
2.10 Low pass band power envelope and speech pauses of test sen¬
tence in restaurant noise 16
2.11 High pass band power envelope and speech pauses of test sen¬
tence in restaurant noise 17
2.12 Speech pause detection performance of the proposed algo¬
rithm and the G.729 VAD algorithm in car noise and babble
noise 19
2.13 Speech pause detection performance of the proposed algo¬
rithm and the G.729 VAD algorithm in aircraft, engine and
factory noise 20
2.14 ROC curve of the proposed algorithm using car noise 21
2.15 ROC: curve of the proposed algorithm using babble noise ... 21
2.16 ROG curve of the proposed algorithm using aircraft noise . . 22
3.1 Evolution of the a posteriori and the a priori SNR 33
3.2 Gain curves of the Ephraim Malah noise reduction algorithms 34
3.3 Gain curves of the Ephraim Malah log spectral algorithm . . 35
4.1 Median audiogram of the hearing impaired subjects 42
V
VI LIST OV FIGURES
5.1 Normal hearing subjects results of tlie paired comparisons in
Experiment 1 with drill noise 66
5.2 Normal hearing subjects results of the paired comparisons in
Experiment 1 with cafeteria noise 66
5.3 Hearing impaired subjects residts of the paired comparisons
in Experiment 1 with drill noise 67
5.4 Hearing impaired subjects results of the paired comparisons
in Experiment 1 with cafeteria noise 67
5.5 Hearing impaired subjects results of the paired comparisons
in Experiment 2 with industrial noise 69
5.6 Hearing impaired subjects results of the paired comparisons
in Experiment 2 with cafeteria noise 70
5.7 Hearing impaired subjects results of the paired comparisons
in Experiment 2 with speech shaped noise 71
6.1 Scatter plot of PMF measure vs. subjective noise suppression
scale values from Experiment 1 83
6.2 Scatter plot of LAR measure vs. subjective speech naturalness
scale values from Experiment 1 84
6.3 Scatter plot of LAR measure vs. subjective overall preference
scale values from Experiment 1 85
6.4 Scatter plot of PSQM measure vs. subjective overall prefer¬
ence scale values from Experiment 1 85
6.5 Scatter plot of WSS measure vs. subjective noise suppression
scale values from Experiment 2 86
6.6 Scatter plot of I SQM measure vs. subjective noise suppres¬
sion scale values from Experiment 2 87
6.7 Scatter plot of PMF measure vs. subjective noise suppression
•scale values from Experiment 2 87
6.8 Scatter plot of LAR measure vs. subjective speech naturalness
scale values from Experiment 2 88
6.9 Scatter plot of LAR measure vs. subjective overall preference
scale values from Experiment 2 89
D.I Optical illustration of noise effects 116
List of Tables
4.1 Noise signals used in the measurements 43
4.2 Classification of Kendall s W coefficient of concordance ... 44
4.3 Listening effort scale 45
4.4 Listening effort test results of Experiment 1 with normal
hearing subjects 46
4.5 Listening effort test results of Experiment 1 with hearing
impaired subjects 47
4.6 Listening effort test results of Experiment 2 with hearing
impaired subjects 48
4.7 Sentence test results of Experiment 1 with normal hearing
subjects in drill noise 53
4.8 Sentence test results of Experiment 1 with normal hearing
subjects in cafeteria noise 54
4.9 Sentence test results of Experiment 1 with hearing impaired
subjects in drill noise 54
4.10 Sentence test results of Experiment 1 with hearing impaired
subjects in cafeteria noise 55
4.11 Sentence test results of Experiment 2 56
5.1 Noise signals used for the paired comparisons 64
6.1 Noise conditions used in the experiments 80
6.2 Pearson correlation between objective measures and subjec¬
tive data from Experiment 1 82
6.3 Pearson correlation between objective measures and subjec¬
tive data from Experiment 2 83
6.4 LAR objective quality measure data for modified noise reduc¬
tion 92
6.5 LAR objective quality measure data for modified noise reduc¬
tion with smoothing the gain factors over frequency 92
6.6 LAR objective quality measure data for modified noise reduc¬
tion with smoothing the gain factors over time 93
A.I Audiograms of the hearing impaired subjects 99
VII
VIII LIST OF TABLES
C.I Bradley Terry model statistics for normal hearing subjects in
Experiment 1 108
C.2 Bradley Terry model statistics for hearing impaired subjects
in Experiment 1 109
C.3 Bradley Terry model statistics for hearing impaired subjects
in Experiment 2 110
D.I Objective quality measures data from Experiment 1 112
D.2 Objective quality measures data from Experiment 2 113
|
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| indexdate | 2024-07-09T18:49:03Z |
| institution | BVB |
| isbn | 3826585135 |
| language | English |
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| publishDate | 2001 |
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| publisher | Shaker |
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| series2 | Berichte aus der medizinischen Physik |
| spelling | Marzinzik, Mark 1970- Verfasser (DE-588)122686861 aut Noise reduction schemes for digital hearing aids and their use for the hearing impaired Mark Marzinzik Aachen Shaker 2001 VII, 132 S. graph. Darst. : 21 cm txt rdacontent n rdamedia nc rdacarrier Berichte aus der medizinischen Physik Zugl.: Oldenburg, Univ., Diss., 2000 Störgeräusch (DE-588)4343358-3 gnd rswk-swf Hörgerät (DE-588)4025412-4 gnd rswk-swf Psychoakustik (DE-588)4176198-4 gnd rswk-swf Störunterdrückung (DE-588)4312859-2 gnd rswk-swf Sprachsignal (DE-588)4056494-0 gnd rswk-swf Sprachqualität (DE-588)4536190-3 gnd rswk-swf (DE-588)4113937-9 Hochschulschrift gnd-content Hörgerät (DE-588)4025412-4 s Sprachsignal (DE-588)4056494-0 s Störgeräusch (DE-588)4343358-3 s Störunterdrückung (DE-588)4312859-2 s Sprachqualität (DE-588)4536190-3 s Psychoakustik (DE-588)4176198-4 s DE-604 HBZ Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=009303696&sequence=000002&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Marzinzik, Mark 1970- Noise reduction schemes for digital hearing aids and their use for the hearing impaired Störgeräusch (DE-588)4343358-3 gnd Hörgerät (DE-588)4025412-4 gnd Psychoakustik (DE-588)4176198-4 gnd Störunterdrückung (DE-588)4312859-2 gnd Sprachsignal (DE-588)4056494-0 gnd Sprachqualität (DE-588)4536190-3 gnd |
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| title | Noise reduction schemes for digital hearing aids and their use for the hearing impaired |
| title_auth | Noise reduction schemes for digital hearing aids and their use for the hearing impaired |
| title_exact_search | Noise reduction schemes for digital hearing aids and their use for the hearing impaired |
| title_full | Noise reduction schemes for digital hearing aids and their use for the hearing impaired Mark Marzinzik |
| title_fullStr | Noise reduction schemes for digital hearing aids and their use for the hearing impaired Mark Marzinzik |
| title_full_unstemmed | Noise reduction schemes for digital hearing aids and their use for the hearing impaired Mark Marzinzik |
| title_short | Noise reduction schemes for digital hearing aids and their use for the hearing impaired |
| title_sort | noise reduction schemes for digital hearing aids and their use for the hearing impaired |
| topic | Störgeräusch (DE-588)4343358-3 gnd Hörgerät (DE-588)4025412-4 gnd Psychoakustik (DE-588)4176198-4 gnd Störunterdrückung (DE-588)4312859-2 gnd Sprachsignal (DE-588)4056494-0 gnd Sprachqualität (DE-588)4536190-3 gnd |
| topic_facet | Störgeräusch Hörgerät Psychoakustik Störunterdrückung Sprachsignal Sprachqualität Hochschulschrift |
| url | http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=009303696&sequence=000002&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
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