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eLibrary > S+ IEC 60645-1 Ed. 4.0 en:2017 (Redline version) Electroacoustics - Audiometric equipment - Part 1: Equipment for pure-tone and speech audiometry >

S+ IEC 60645-1 Ed. 4.0 en:2017 (Redline version) Electroacoustics - Audiometric equipment - Part 1: Equipment for pure-tone and speech audiometry, 2017

Redline version (English only) [Go to Page]
CONTENTS
FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
4 Requirements by type and class of audiometer
5 General requirements [Go to Page]
5.1 General safety requirements
5.2 Acoustic safety requirements
5.3 Environmental conditions
5.4 Warm-up time
5.5 Power supply variation [Go to Page]
5.5.1 Interruption of power supply
5.5.2 Mains operation
5.5.3 Battery operation
5.5.4 Other power supplies
5.6 Electromagnetic compatibility
5.7 Unwanted sound [Go to Page]
5.7.1 General
5.7.2 Unwanted sound from and between any combination of transducers
5.7.3 Unwanted sound from an earphone
5.7.4 Unwanted sound from a bone vibrator
5.7.5 Unwanted sound radiated by an audiometer
5.8 Testing of automatic-recording audiometers
5.9 Interface connections
6 Test signals [Go to Page]
6.1 Speech signals [Go to Page]
6.1.1 Speech signal general requirements
6.1.2 Free-field equivalent earphone output level
6.1.3 Uncorrected earphone output level
6.1.4 Loudspeaker output level
6.1.5 Bone vibrator output level
6.1.6 Speech signal frequency response
6.1.7 Calibration signal
6.1.8 Live voice microphone frequency response
6.1.9 Scale reference and output level
6.1.10 Distortion requirements for speech signals
6.2 Pure tones [Go to Page]
6.2.1 Frequency range and hearing level range
6.2.2 Frequency acceptance limits
6.2.3 Total harmonic distortion
6.2.4 Rate of frequency change
6.2.5 Frequency modulation
6.3 External signal sources [Go to Page]
6.3.1 Signals
6.3.2 Frequency response
6.3.3 Playback device input
6.3.4 Signal-to-noise ratio for playback device input
6.3.5 Electrical sensitivity
6.3.6 Reference level for external signal source
6.4 Operator and test subject speech communication [Go to Page]
6.4.1 General
6.4.2 Operator to test subject speech communication (talk-forward)
6.4.3 Test subject to operator speech communication (talk-back)
6.4.4 Operator to test subject speech communication for live voice speech audiometry
6.4.5 Test subject to operator speech communication for vocal response speech audiometry
6.5 Masking sound [Go to Page]
6.5.1 General
6.5.2 Narrow-band noise
6.5.3 Speech weighted noise
6.5.4 Other masking sound
7 Transducers [Go to Page]
7.1 Types of transducers
7.2 Headband
7.3 Loudspeaker
8 Signal level control [Go to Page]
8.1 Marking of pure-tone and speech signal level controls
8.2 Signal indicator
8.3 Sound pressure level and vibratory force level acceptance limits
8.4 Signal level control [Go to Page]
8.4.1 Manual audiometers
8.4.2 Automatic-recording audiometers
8.4.3 Signal level control acceptance limits
8.5 Masking sound level control [Go to Page]
8.5.1 General
8.5.2 Masking sound level
8.5.3 Masking sound level acceptance limits
8.5.4 Masking sound level range
8.6 Signal switching [Go to Page]
8.6.1 Signal switch for manual audiometers
8.6.2 On/off ratio for manual audiometers
8.6.3 Rise/fall times for manual audiometers
8.6.4 Automatic pulsed presentation
8.6.5 Subject’s response system
8.6.6 Subject’s response time for automated test procedures
9 Reference tone [Go to Page]
9.1 General
9.2 Frequencies
9.3 Reference tone level control [Go to Page]
9.3.1 Range
9.3.2 Intervals
9.3.3 Marking
9.3.4 Acceptance limits
9.3.5 Operation
10 Calibration
11 Electrical output of test signals
12 Audiogram format
13 Test requirements to demonstrate conformity [Go to Page]
13.1 General
13.2 Environmental conditions and power supply variation
13.3 Electromagnetic compatibility
13.4 Unwanted sound [Go to Page]
13.4.1 Unwanted sound from an earphone
13.4.2 Unwanted sound from a bone vibrator
13.4.3 Unwanted sound radiated by an audiometer
13.5 Total harmonic distortion of test signals
13.6 Microphone for live voice speech testing
13.7 Signal accuracy [Go to Page]
13.7.1 Accuracy of sound pressure level and vibratory force level
13.7.2 Accuracy of hearing level control
13.8 Masking sound [Go to Page]
13.8.1 Narrow-band noise
13.8.2 Masking sound level
13.9 Headbands [Go to Page]
13.9.1 General
13.9.2 Supra-aural and circumaural earphone headband
13.9.3 Bone vibrator headband
14 Maximum permitted expanded uncertainty of measurements Umax
15 Marking and instruction manual [Go to Page]
15.1 Marking
15.2 Instruction manual
Annex A (informative)Relationship between tolerance interval, corresponding acceptance interval and the maximum permitted uncertainty of measurement
Bibliography
Figures [Go to Page]
Figure 1 – Rise/fall envelope of test tones
Figure A.1 – Relationship between tolerance interval, corresponding acceptance interval and the maximum permitted uncertainty of measurement
Tables [Go to Page]
Table 1 – Minimum facilities for audiometers
Table 2 – Minimum number of frequencies to be provided and the minimum range of values of hearing level for type and class of audiometer
Table 3 – Maximum permissible acoustic total harmonic distortion, for supra-aural, circumaural, insert earphones and bone vibrators
Table 4 – Narrow-band masking noise: upper and lower cut-off frequencies for a sound pressure spectrum density level of –3 dB referenced to the level at the centre frequency of the band
Table 5 – Standards specifying reference equivalent threshold levels
Table 6 – Symbols for the graphical presentation of hearing threshold levels
Table 7 – Values of Umax for basic measurements
International standard (Bilingual) [Go to Page]
English [Go to Page]
CONTENTS
FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
4 Requirements by type and class of audiometer
5 General requirements [Go to Page]
5.1 General safety requirements
5.2 Acoustic safety requirements
5.3 Environmental conditions
5.4 Warm-up time
5.5 Power supply variation [Go to Page]
5.5.1 Interruption of power supply
5.5.2 Mains operation
5.5.3 Battery operation
5.5.4 Other power supplies
5.6 Electromagnetic compatibility
5.7 Unwanted sound [Go to Page]
5.7.1 General
5.7.2 Unwanted sound from and between any combination of transducers
5.7.3 Unwanted sound from an earphone
5.7.4 Unwanted sound from a bone vibrator
5.7.5 Unwanted sound radiated by an audiometer
5.8 Testing of automatic-recording audiometers
5.9 Interface connections
6 Test signals [Go to Page]
6.1 Speech signals [Go to Page]
6.1.1 Speech signal general requirements
6.1.2 Free-field equivalent earphone output level
6.1.3 Uncorrected earphone output level
6.1.4 Loudspeaker output level
6.1.5 Bone vibrator output level
6.1.6 Speech signal frequency response
6.1.7 Calibration signal
6.1.8 Live voice microphone frequency response
6.1.9 Scale reference and output level
6.1.10 Distortion requirements for speech signals
6.2 Pure tones [Go to Page]
6.2.1 Frequency range and hearing level range
6.2.2 Frequency acceptance limits
6.2.3 Total harmonic distortion
6.2.4 Rate of frequency change
6.2.5 Frequency modulation
6.3 External signal sources [Go to Page]
6.3.1 Signals
6.3.2 Frequency response
6.3.3 Playback device input
6.3.4 Signal-to-noise ratio for playback device input
6.3.5 Electrical sensitivity
6.3.6 Reference level for external signal source
6.4 Operator and test subject speech communication [Go to Page]
6.4.1 General
6.4.2 Operator to test subject speech communication (talk-forward)
6.4.3 Test subject to operator speech communication (talk-back)
6.4.4 Operator to test subject speech communication for live voice speech audiometry
6.4.5 Test subject to operator speech communication for vocal response speech audiometry
6.5 Masking sound [Go to Page]
6.5.1 General
6.5.2 Narrow-band noise
6.5.3 Speech weighted noise
6.5.4 Other masking sound
7 Transducers [Go to Page]
7.1 Types of transducers
7.2 Headband
7.3 Loudspeaker
8 Signal level control [Go to Page]
8.1 Marking of pure-tone and speech signal level controls
8.2 Signal indicator
8.3 Sound pressure level and vibratory force level acceptance limits
8.4 Signal level control [Go to Page]
8.4.1 Manual audiometers
8.4.2 Automatic-recording audiometers
8.4.3 Signal level control acceptance limits
8.5 Masking sound level control [Go to Page]
8.5.1 General
8.5.2 Masking sound level
8.5.3 Masking sound level acceptance limits
8.5.4 Masking sound level range
8.6 Signal switching [Go to Page]
8.6.1 Signal switch for manual audiometers
8.6.2 On/off ratio for manual audiometers
8.6.3 Rise/fall times for manual audiometers
8.6.4 Automatic pulsed presentation
8.6.5 Subject’s response system
8.6.6 Subject’s response time for automated test procedures
9 Reference tone [Go to Page]
9.1 General
9.2 Frequencies
9.3 Reference tone level control [Go to Page]
9.3.1 Range
9.3.2 Intervals
9.3.3 Marking
9.3.4 Acceptance limits
9.3.5 Operation
10 Calibration
11 Electrical output of test signals
12 Audiogram format
13 Test requirements to demonstrate conformity [Go to Page]
13.1 General
13.2 Environmental conditions and power supply variation
13.3 Electromagnetic compatibility
13.4 Unwanted sound [Go to Page]
13.4.1 Unwanted sound from an earphone
13.4.2 Unwanted sound from a bone vibrator
13.4.3 Unwanted sound radiated by an audiometer
13.5 Total harmonic distortion of test signals
13.6 Microphone for live voice speech testing
13.7 Signal accuracy [Go to Page]
13.7.1 Accuracy of sound pressure level and vibratory force level
13.7.2 Accuracy of hearing level control
13.8 Masking sound [Go to Page]
13.8.1 Narrow-band noise
13.8.2 Masking sound level
13.9 Headbands [Go to Page]
13.9.1 General
13.9.2 Supra-aural and circumaural earphone headband
13.9.3 Bone vibrator headband
14 Maximum permitted expanded uncertainty of measurements Umax
15 Marking and instruction manual [Go to Page]
15.1 Marking
15.2 Instruction manual
Annex A (informative) Relationship between tolerance interval, corresponding acceptance interval and the maximum permitted uncertainty of measurement
Bibliography
Figures [Go to Page]
Figure 1 – Rise/fall envelope of test tones
Figure A.1 – Relationship between tolerance interval, corresponding acceptance interval and the maximum permitted uncertainty of measurement
Tables [Go to Page]
Table 1 – Minimum facilities for audiometers
Table 2 – Minimum number of frequencies to be provided and the minimum range of values of hearing level for type and class of audiometer
Table 3 – Maximum permissible acoustic total harmonic distortion, for supra-aural, circumaural, insert earphones and bone vibrators
Table 4 – Narrow-band masking noise: upper and lower cut-off frequencies for a sound pressure spectrum density level of –3 dB referenced to the level at the centre frequency of the band
Table 5 – Standards specifying reference equivalent threshold levels
Table 6 – Symbols for the graphical presentation of hearing threshold levels
Table 7 – Values of Umax for basic measurements
Français [Go to Page]
SOMMAIRE
AVANT-PROPOS
INTRODUCTION
1 Domaine d'application
2 Références normatives
3 Termes et définitions
4 Exigences par type et par classe d'audiomètre
5 Exigences générales [Go to Page]
5.1 Exigences relatives à la sécurité générale
5.2 Exigences relatives à la sécurité acoustique
5.3 Conditions d'environnement
5.4 Durée de préchauffage
5.5 Variation de l'alimentation [Go to Page]
5.5.1 Coupure de l'alimentation
5.5.2 Fonctionnement sur le secteur
5.5.3 Fonctionnement sur batterie
5.5.4 Autres types d'alimentations
5.6 Compatibilité électromagnétique
5.7 Sons indésirables [Go to Page]
5.7.1 Généralités
5.7.2 Sons indésirables émis par et entre une combinaison quelconque de transducteurs
5.7.3 Sons indésirables émis par un écouteur
5.7.4 Sons indésirables émis par un ossivibrateur
5.7.5 Sons indésirables rayonnés par un audiomètre
5.8 Essais d'audiomètres automatiques enregistreurs
5.9 Liaisons d'interface
6 Signaux d'essai [Go to Page]
6.1 Signaux vocaux [Go to Page]
6.1.1 Exigences générales applicables aux signaux vocaux
6.1.2 Niveau de sortie d'écouteur équivalent en champ libre
6.1.3 Niveau de sortie d'écouteur non corrigé
6.1.4 Niveau de sortie de haut-parleur
6.1.5 Niveau de sortie d'ossivibrateur
6.1.6 Réponse en fréquence d'un signal vocal
6.1.7 Signal d'étalonnage
6.1.8 Réponse en fréquence d'un microphone vocal utilisant la voix naturelle
6.1.9 Référence d'échelle et niveau de sortie
6.1.10 Exigences de distorsion applicables aux signaux vocaux
6.2 Sons purs [Go to Page]
6.2.1 Plage de fréquences et plage de niveaux d'audition
6.2.2 Limites d'acceptation de la fréquence
6.2.3 Distorsion harmonique totale
6.2.4 Vitesse de variation de la fréquence
6.2.5 Modulation de fréquence
6.3 Sources externes de signaux [Go to Page]
6.3.1 Signaux
6.3.2 Réponse en fréquence
6.3.3 Entrée du dispositif de lecture
6.3.4 Rapport signal sur bruit pour l'entrée du dispositif de lecture
6.3.5 Sensibilité électrique
6.3.6 Niveau de référence pour la source externe du signal
6.4 Communication vocale entre l'opérateur et le sujet d'essai [Go to Page]
6.4.1 Généralités
6.4.2 Communication vocale de l'opérateur vers le sujet d'essai (talk-forward)
6.4.3 Communication vocale du sujet d'essai vers l'opérateur (talk-back)
6.4.4 Communication vocale de l'opérateur vers le sujet d'essai pour l'audiométrie vocale en voix naturelle humaine
6.4.5 Communication vocale du sujet d'essai vers l'opérateur pour l'audiométrie vocale en réponse vocale
6.5 Bruit de masquage [Go to Page]
6.5.1 Généralités
6.5.2 Bruit à bande étroite
6.5.3 Bruit vocal pondéré
6.5.4 Autres bruits de masquage
7 Transducteurs [Go to Page]
7.1 Types de transducteurs
7.2 Serre-tête
7.3 Haut-parleur
8 Commande de niveau du signal [Go to Page]
8.1 Marquage des commandes de niveau de signal vocal et tonal
8.2 Indicateur de signal
8.3 Limites d'acceptation du niveau de pression acoustique et du niveau de force vibratoire
8.4 Commande de niveau du signal [Go to Page]
8.4.1 Audiomètres manuels
8.4.2 Audiomètres automatiques enregistreurs
8.4.3 Limites d'acceptation du niveau de signal de commande
8.5 Commande de niveau du bruit de masquage [Go to Page]
8.5.1 Généralités
8.5.2 Niveau de bruit de masquage
8.5.3 Limites d'acceptation du niveau de bruit de masquage
8.5.4 Plage de niveaux de bruit de masquage
8.6 Commutation de signal [Go to Page]
8.6.1 Commutateur de signal pour les audiomètres manuels
8.6.2 Rapport marche/arrêt pour les audiomètres manuels
8.6.3 Durées de croissance/décroissance du son pour les audiomètres manuels
8.6.4 Présentation automatique de sons pulsés
8.6.5 Système de réponse du sujet
8.6.6 Temps de réponse du sujet pour les procédures d'essai automatisées
9 Son de référence [Go to Page]
9.1 Généralités
9.2 Fréquences
9.3 Commande de niveau du son de référence [Go to Page]
9.3.1 Plage
9.3.2 Intervalles
9.3.3 Marquage
9.3.4 Limites d’acceptation
9.3.5 Utilisation
10 Etalonnage
11 Sortie électrique des signaux d'essai
12 Format de l'audiogramme
13 Exigences d'essai permettant de démontrer la conformité [Go to Page]
13.1 Généralités
13.2 Conditions ambiantes et variations de l'alimentation
13.3 Compatibilité électromagnétique
13.4 Sons indésirables [Go to Page]
13.4.1 Sons indésirables émis par un écouteur
13.4.2 Sons indésirables émis par un ossivibrateur
13.4.3 Sons indésirables rayonnés par un audiomètre
13.5 Distorsion harmonique totale des signaux d'essai
13.6 Microphone pour essais vocaux en voix naturelle
13.7 Exactitude du signal [Go to Page]
13.7.1 Exactitude du niveau de pression acoustique et du niveau de force vibratoire
13.7.2 Exactitude de la commande de niveau d'audition
13.8 Bruit de masquage [Go to Page]
13.8.1 Bruit à bande étroite
13.8.2 Niveau de bruit de masquage
13.9 Serre-tête [Go to Page]
13.9.1 Généralités
13.9.2 Serre-tête pour écouteur supra-aural et circumaural
13.9.3 Serre-tête pour ossivibrateur
14 Valeurs maximales admissibles pour l'incertitude élargie des mesures Umax
15 Marquage et notice d'emploi [Go to Page]
15.1 Marquage
15.2 Notice d'emploi
Annexe A (informative) Relation entre l'intervalle de tolérance, l'intervalle d'acceptation correspondant et l'incertitude maximale admissible de mesure
Bibliographie
Figures [Go to Page]
Figure 1 – Enveloppe de croissance/décroissance des sons d'essai
Figure A.1 – Relation entre l'intervalle de tolérance, l'intervalle d'acceptationcorrespondant et l'incertitude maximale admissible de mesure
Tableaux [Go to Page]
Tableau 1 – Dispositifs minimaux des audiomètres
Tableau 2 – Nombre minimal de fréquences à fournir et plage minimale de valeurs de niveaux d'audition par type et par classe d'audiomètre
Tableau 3 – Valeurs maximales admissibles de la distorsion acoustique harmonique totale pour les écouteurs supra-auraux, circumauraux ou internes et pour les ossivibrateurs
Tableau 4 – Bruit de masquage à bande étroite: fréquences de coupure inférieures et supérieures pour un niveau de densité spectrale de pression acoustique de –3 dB par rapport au niveau correspondant à la fréquence médiane de la bande
Tableau 5 – Normes spécifiant les niveaux de référence équivalents liminaires
Tableau 7 – Valeurs de Umax pour les mesures fondamentales [Go to Page]

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S+ IEC 60645-1 Ed. 4.0 en:2017 (Redline version) Electroacoustics - Audiometric equipment - Part 1: Equipment for pure-tone and speech audiometry, 2017

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S+ IEC 60645-1 Ed. 4.0 en:2017 (Redline version) Electroacoustics - Audiometric equipment - Part 1: Equipment for pure-tone and speech audiometry, 2017

⨯To continue with accurate pricing,
please select your company type below: