Acoustics. Reference zero for the calibration of audiometric equipment - Preferred test conditions for the determination of reference hearing threshold levels shop-only Additional and special requirements can

Additional and special requirements can apply to the electrical equipment of fabrication equipment that:

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thus simulating application conditions where the transducer is exposed to multi-axial vibration

that are self-contained in a single enclosure

Anodic oxidation is an electrochemical technique for producing an oxide coating on a metallic substrate

Acoustics. Reference zero for the calibration of audiometric equipment - Preferred test conditions for the determination of reference hearing threshold levels shop-only Additional and special requirements can1 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.