A-A-54524 Cup, Earphone, Audiometer

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A-A-54524

Background noise

Level (Db)	Octave band of white noise (cycles per second)	Pure tone test frequency (cycles per second)	Minimum noise flat plate (Db)	Attenuation real head (Db)
60	300 � 600	500	35	25
60	600 � 1200	1000	45	29
64	1200 � 2400	2000	54	35
66	2400 � 4800	3000	52	37
70	2400 � 4800	4000	50	41
74	4800 � 9600	6000	49	45

Workmanship. The audiometer earphone cup shall be free from defects which detract from its appearance or impair its serviceability. ��

Unit. Pair (PR). One pair of earphone cups, as specified, constitutes one unit.

Quality Assurance Provisions.

Responsibility for inspection. Unless otherwise specified in the contract or purchase order, the contractor is responsible for the performance of all inspection requirements as specified herein. Except as otherwise specified in the contact or purchase order, the contractor may use his own or any facilities suitable for the performance of the inspection requirements specified herein, unless disapproved by the Government. The Government reserves the right to perform any of the inspections set forth in the specification where such inspections are deemed necessary to assure supplies and services conform to prescribed requirements.

Records. Records of examinations and tests performed by or for the contractor shall be maintained by the contractor and made available to the Government upon the Government�s request, at any time, or from time to time, during the performance of the contract and for a period of three years after delivery of the supplies to which such records relate.

Inspection. Inspection, as used herein, is defined as both examination (such as visual or auditory investigation without the use of special laboratory appliances or procedures) and testing (determination by technical means of physical and chemical properties) of the item.