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GB/T 4854.8-2007: Acoustics -- Reference zero for the calibration of audiometric equipment -- Part 8: Reference equivalent threshold sound pressure levels for pure tone and circumaural earphones
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| GB/T 4854.8-2007 | English | 214 |
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Acoustics -- Reference zero for the calibration of audiometric equipment -- Part 8: Reference equivalent threshold sound pressure levels for pure tone and circumaural earphones
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GB/T 4854.8-2007
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Basic data | Standard ID | GB/T 4854.8-2007 (GB/T4854.8-2007) | | Description (Translated English) | Acoustics -- Reference zero for the calibration of audiometric equipment -- Part 8: Reference equivalent threshold sound pressure levels for pure tone and circumaural earphones | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | A59 | | Classification of International Standard | 17.140 | | Word Count Estimation | 11,113 | | Date of Issue | 2007-11-14 | | Date of Implementation | 2008-05-01 | | Quoted Standard | GB/T 4854.1; GB/T 7584.1; GB/T 7341.2; IEC 60318-1-1998; IEC 60318-2-1998 | | Adopted Standard | ISO 389-8-2004, IDT | | Regulation (derived from) | China Announcement of Newly Approved National Standards No. 12 of 2007 (No. 112 overall) | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This standard specifies the frequency range 125Hz ~ 8000Hz pure tone reference equivalent threshold sound pressure levels for a special model with earphones air conduction audiometry equipment calibration. Appendix B shows that earphones sound attenuation. Appendix C gives the AE and BE classes language classes audiometer headphones free field equivalent output correction value. | GB/T 4854.8-2007: Acoustics -- Reference zero for the calibration of audiometric equipment -- Part 8: Reference equivalent threshold sound pressure levels for pure tone and circumaural earphones
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Acoustics Reference zero for the calibration of audiometric equipment Part 8. Reference equivalent threshold sound pressure levels for pure tone and circumaural earphones
ICS 17.140
A59
National Standards of People's Republic of China
GB/T 4854.8-2007/ISO 389-8.2004
Acoustics - Reference zero for the calibration of audiometric equipment
Part 8. Headphones pure tone benchmarks, etc.
SPL threshold effect
(ISO 389-8.2004, IDT)
Posted 2007-11-14
2008-05-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Table of Contents
Preface Ⅰ
Introduction Ⅱ
1 Scope 1
2 Normative references 1
3 Terms and definitions
4 technical requirements
Appendix A (informative) obtained HDA200 on type headphones circumaural audiometry Reference equivalent threshold sound pressure levels of note 3
Sound Appendix B (Informative Appendix) HDA200 headphones attenuation 4
Correction value Appendix C (Informative Appendix) HDA200 type Headphones free field equivalent output of 5
Reference 6
GB/T 4854.8-2007/ISO 389-8.2004
Foreword
GB/T 4854 "acoustic calibration of audiometric equipment - Reference zero" includes eight parts.
--- Part 1. the ear headphones pure tone reference equivalent threshold sound pressure levels (GB/T 4854.1);
--- Part 2. pure tones and insert earphones Reference equivalent threshold sound pressure levels (GB/T 16402);
--- Part 3. pure tones and bone vibrators Reference equivalent threshold force levels (GB/T 4854.3);
--- Part 4. Reference levels for narrow-band masking noise (GB/T 4854.4);
Part --- Article 5. 8kHz ~ 16kHz frequency range of pure tone reference equivalent threshold sound pressure levels (GB/T 4854.5);
--- Part 6. short duration of the test signal reference equivalent threshold sound pressure levels;
--- Part 7. Reference free field and diffuse - field listening hearing threshold (GB/T 4854.7);
--- Part 8. Headphones pure tone reference equivalent threshold sound pressure levels (GB/T 4854.8).
This section GB/T Section 84854 of.
This part identical with ISO 389-8.2004 "Reference zero for the Section 8 acoustic calibrator audiometric equipment. Headphones pure sound base
Quasi-equivalent threshold sound pressure levels "(in English).
This section is equivalent to using international standards made editorial changes.
This part of the Annex A, Annex B and Annex C is informative appendix.
This section proposed by the Chinese Academy of Sciences.
The acoustics in part by the National Standardization Technical Committee (SAC/TC17) centralized.
This section is drafted. PLA General Hospital Institution of Otorhinolaryngology, Institute of Acoustics.
The main drafters of this section. Chen Hongwen, Wu Wenming, at dawn, Zhang Yu Wei, Dai Genhua.
GB/T 4854.8-2007/ISO 389-8.2004
Introduction
The enactment of this section, in order to be able to use the same headset 125Hz ~ 16000Hz frequency range for pure tone audiometry. This section
It specifies the reference value of 125Hz ~ 8000Hz, GB/T 4854.5 defines the reference value of 8000Hz ~ 16000Hz.
The reference value is based on the most reliable data available laboratories in different countries can be provided at the time determined.
Currently, these reference values only for SENNHEISERHDA200 this kind of model of earphones. This headset for background noise
Sound good sound attenuation, and its frequency response in the human ear and ear simulator there is no obvious resonance.
GB/T 4854.8-2007/ISO 389-8.2004
Acoustics - Reference zero for the calibration of audiometric equipment
Part 8. Headphones pure tone reference equivalent threshold sound pressure levels
1 Scope
This section provides a frequency range of 125Hz ~ 8000Hz pure tone reference equivalent threshold sound pressure levels (RETSPLs), equipped with a suitable
A special type of earphones (SENNHEISERHDA200) of air conduction audiometry calibration equipment.
Note. This paper presents results HDA200 type Headphones Reference equivalent threshold sound pressure levels and test conditions described in Annex A and references.
Appendix B gives the sound attenuation of this ear headphones. Appendix C gives A-E and Class B-E Language audiometer (see
Free field GB/T 7341.2) headphone output equivalent correction value.
2 Normative references
The following documents contain provisions which, through reference to GB/T 4854 to the present, constitute provisions of this section. For dated reference documents
Member, all subsequent amendments (not including errata content) or revisions do not apply to this section, however, encouraged to reach under this section
Parties to research agreement to use the latest versions of these documents. For undated reference documents, the latest versions apply to this
section.
GB/T 4854.1 acoustic calibration of audiometric equipment - Reference zero - Part 1. the ear headphones pure tone reference equivalent threshold sound pressure levels
(GB/T 4854.1-2004, ISO 389-1.1998, IDT)
Subjective method of measurement of sound attenuation (GB/T 7584.1-2004,. GB/T 7584.1 Hearing protectors - Part 1
ISO 4869-1.1990, IDT)
GB/T 7341.2 Audiometers - Part 2. Language audiometric equipment (GB/T 7341.2-1998, idt IEC 60645-2.1993)
IEC 60318-1.1998 electric acoustic head and ear simulator - Part 1. Align the ear headphones with ear simulator
IEC 60318-2.1998 electric acoustic head and ear simulator - Part 2. Calibration extends the high frequency range audiometer headphones Pro
When the acoustic coupling chamber
3 Terms and Definitions
This part of GB/T 4854.1, GB/T 7341.2, GB/T 7584.1 and IEC 60318-1.1998 The terms and definitions.
4. Technical Requirements
Coupled cavity or ear simulator Reference equivalent threshold sound pressure levels and the adapter with the headset model and calibration headphones using. Table 1 to
A closed type earphones SENNHEISER HDA200 type with IEC 60318-1.1998 and the provisions of the ear simulator
IEC 60318-2.1998 benchmark adapter measured predetermined Figure 1 equivalent threshold sound pressure levels.
GB/T 4854.8-2007/ISO 389-8.2004
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