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BS EN ISO 389-4:1994 : Implementation of ISO 389-4:1994 Acoustics — Reference zero for the calibration of audiometric equipment — Part 4. Reference levels for narrow-band masking noise

Description Printed version of this standard is available at Library. To request, please e-mail to referencepk@usm.my and include a copy of this record in your e-mail. Abstract This part of ISO 389 specifies reference levels for narrow-band masking noise presented by air conduction from an earphone in pure-tone audiometry. The data are given in terms of levels to be added to the reference equivalent threshold sound pressure levels for the corresponding pure-tone frequencies as specified in ISO 389:1991 or ISO 389-2, respectively, when the masking earphone is placed on the appropriate acoustic coupler, ear simulator or artificial ear.

Contributor(s): MJMS - Data Entry Person Primary Item Type: British Standard Identifiers: International relationships Identical to: ISO 389-4:1994 ICS 13.140 Noise with respect to human beings ICS 11.040.01 Medical equipment in general ISBN 0580235998 Language: English Subject Keywords: Acoustic signals; Audiometry; Bandwidths; Acoustic measurement; Frequencies; Audio frequencies; Hearing (auditory perception); Audibility; Auditory threshold First presented to the public: 10/21/2022 Original Publication Date: 3/15/1995 Previously Published By: British Standards Institution Place Of Publication: London, United Kingdom Citation: Extents: Number of Pages - 4 License Grantor / Date Granted:   / ( View License ) Date Deposited 2022-10-21 17:04:04.593 Submitter: Mohd Jasnizam Mohd Salleh

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