Acoustics. Reference zero for the calibration of audiometric equipment - Preferred test conditions for the determination of reference hearing threshold levels shop-only that are self-contained in a

that are self-contained in a single enclosure

use of specific inspection bodies and discriminatory certification systems or import licenses

Manufacturers of solid fertilizer distributors

BS 6349 is a British Standard that discusses maritime works

Acoustics. Reference zero for the calibration of audiometric equipment - Preferred test conditions for the determination of reference hearing threshold levels shop-only that are self-contained in a1 Scope This part of ISO 389 specifies test conditions for determining the hearing thresholds of subjects for the purpose of establishing standardized values for reference hearing threshold levels.