Fiche d'interprétation de la norme NF S 31-009 de décembre 1981.
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Hearing aids. Methods for measurement of electroacoustical characteristics of hearing aid equipment not entirely worn on the listener
€269.00
Specification for reference coupler for the measurement of hearing aids using earphones coupled to the ear by means of ear inserts
€95.00
Specification for dimensions of plugs for hearing aids
Measurement of airborne noise emitted by machines; enveloping surface method; metal working machines; milling machines
€34.30
Measurement of airborne noise emitted by machines - Enveloping surface method - Form for measurement report; Textile machines
Assessment of noise in the working area with regard to specific operations
€51.99
Recommendations for the assessment of noise inside motor vehicles
Measurement of airborne noise emitted by machines - Enveloping surface method - Internal combustion engine powered siton fork lift trucks
Hearing aids Method for measurement of characteristics hearing with induction pick-up coil input
Methods of measurement electro-acoustical characteristics hearing aids Hearing with automatic gain control circuits
Method of expression of physical and subjective magnitudes of sound or noise in air
€77.00
Standard noise levels of technical sound sources; flares
€28.15
Character noise emission values of technical sound sources; cutting machine tools; lathers
Characteristic noise emission values of technical sound sources; cutting machine tools; milling machines
