BS EN 60645-1-2017 pdf free download.Electroacoustics – Audiometric equipment Part 1: Equipment for pure-tone and speech audiometry (IEC 60645-1:2017)
This part of IEC 60645 specifies general requirements for audiometers designed for use in determining hearing threshold levels, relative to standard reference threshold levels established by means of psychoacoustic test methods, and those designed to perform psychoacoustic tests using speech material.
The object of this standard is to ensure:
a) that tests of hearing in the frequency range 1 25 Hz to 1 6 kHz on a given human ear, performed with different pure-tone audiometers which comply with this standard, give substantially the same results;
b) that the results obtained represent a valid comparison between the hearing of the ear tested and the reference threshold of hearing;
c) that a means of presenting speech material to a subject in a standardized manner is provided. This will ensure that tests of hearing using a specific speech signal and a specific manner of signal presentation, when performed with different audiometers which comply with this standard, give substantially the same results;
d) that audiometers are classified according to the range of test signals they present,according to the mode of operation or according to their presumed primary application.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
IEC 60268-3, Sound system equipment – Part 3: Amplifiers
IEC 60268-7, Sound system equipment – Part 7: Headphones and earphones
IEC 60268-1 7, Sound system equipment – Part 17: Standard volume indicators
IEC 6031 8-1 , Electroacoustics – Simulators of human head and ear – Part 1: Ear simulator for the measurement of supra-aural and circumaural earphones
IEC 6031 8-3, Electroacoustics – Simulators of human head and ear – Part 3: Acoustic coupler for the calibration of supra-aural earphones used in audiometry
IEC 6031 8-4, Electroacoustics – Simulators of human head and ear – Part 4: Occluded-ear simulator for the measurement of earphones coupled to the ear by means of ear inserts
IEC 6031 8-5, Electroacoustics – Simulators of human head and ear – Part 5: 2 cm³ coupler for the measurement of hearing aids and earphones coupled to the ear by means of ear inserts
IEC 6031 8-6, Electroacoustics – Simulators of human head and ear – Part 6: Mechanical coupler for the measurement of bone vibrators
IEC 60601 -1 , Medical electrical equipment – Part 1: General requirements for basic safety and essential performance
IEC 60601 -1 -2, Medical electrical equipment – Part 1-2: General requirements for basic safety
and essential performance – Collateral standard: Electromagnetic disturbances – Requirements and tests
IEC 61 260-1 , Electroacoustics – Octave-band and fractional-octave-band filters – Part 1: Specifications
IEC 61 672-1 , Electroacoustics – Sound level meters – Part 1: Specifications
ISO 266, Acoustics – Preferred frequencies
ISO 389-1 , Acoustics – Reference zero for the calibration of audiometric equipment – Part 1: Reference equivalent threshold sound pressure levels for pure tones and supra-aural earphones
ISO 389-2, Acoustics – Reference zero for the calibration of audiometric equipment – Part 2: Reference equivalent threshold sound pressure levels for pure tones and insert earphones
ISO 389-3, Acoustics – Reference zero for the calibration of audiometric equipment – Part 3: Reference equivalent threshold force levels for pure tones and bone vibrators
ISO 389-4:1 994, Acoustics – Reference zero for the calibration of audiometric equipment – Part 4: Reference levels for narrow-band masking noise
ISO 389-5, Acoustics – Reference zero for the calibration of audiometric equipment – Part 5: Reference equivalent threshold sound pressure levels for pure tones in the frequency range 8 kHz to 16 kHz
ISO 389-7, Acoustics – Reference zero for the calibration of audiometric equipment – Part 7: Reference threshold of hearing under free-field and diffuse-field listening conditions
ISO 389-8, Acoustics – Reference zero for the calibration of audiometric equipment – Part 8: Reference equivalent threshold sound pressure levels for pure tones and circumaural earphones
ISO 4869-1 , Acoustics – Hearing protectors – Part 1: Subjective method for the measurement of sound attenuation
ISO 8253-1 :201 0, Acoustics – Audiometric test methods – Part 1: Pure-tone air and bone conduction audiometry
ISO 8253-2, Acoustics – Audiometric test methods – Part 2: Sound field audiometry with puretone and narrow-band test signals
ISO 8253-3, Acoustics – Audiometric test methods – Part 3: Speech audiometry
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1 equipment for pure-tone audiometry
pure-tone audiometer
instrument for the measurement of hearing for pure tones and in particular of the threshold of hearing
Note 1 to entry: The pure-tone audiometer may be either of a fixed or continuous sweep frequency type.BS EN 60645-1 pdf download