DOD A-A-53777-1988 AUDIOMETER MANUALLY OPERATED PORTABLE 110 220 VOLT 50 60 HZ AC《交流电50 60赫兹110 220伏特便携式手操作听度计》.pdf

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1、Ip A-A-53777 65 U 9999774 0033873 T = A-A- 5 3 7 7 7 10 December 1988 COMMERCIAL ITEM DESCRIPTION AUDIOMETER, Manually Operated, Portable, 110/220 Volt, 50/60 Hz, AC The General Services Administration has authorized the use of this commercial item description in preference to Military Specification

2、 MIL-A-36494, which is cancelled. This commercial item description covers a single channel, fixed frequency oscillator, portable, manually operated, audiometer capable of performing basic threshold evaluations with calibrated masking noise and bone conduction. Salient characteristics. General. The a

3、udiometer shall be capable of performing the following pure tone hearing tests: Pure tone air conduction. Pure tone air conduction with masking. Pure tone bone conduction. Pure tone bone conduction with masking. The audiometer shall comply with American National Standards Institute (ANSI) Standard S

4、3.6. In the event of confliction, the requirements specified herein shall take precedence. Exceptions. not apply: The following portions of ANSI Standard S3.6 do 4.2 Test Tones for Limited Range amd Narrow Range Audiometers 4.3 Variation in Method of Presentation of Test Tones 5. Requirements for Sp

5、eech Audiometers AMSC/ NA FSC 6515 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. THIS DOCUMENT CONTAINS 8 PAGES.- _- - Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Test Tones. least the following fixed frequenci

6、es: The audiometer shall generate test tones of at Air Conduction (Hz) 250 500 1000 1500 2000 3000 4000 5000 6000 8000 Bone Conduction (Hz) 250 500 1000 1500 2000 3000 4000 Accessories. accessories: The unit shall be provided with the following 1 Pr 1 Set 1 Set 1 Ea 6 Ea 1 Pr Description Air Receive

7、rs Head Band and Cord Patch Cord for (See Note 2) Audiometer Booth Bone Oscillator with Headband and Cord Spare Fuses (if applicable) Additional Air Receiver Cord Instructions. Instruction and Service manuals. repair parts and wiring diagrams shall be included. Electrical. from the following line so

8、urces: 110 volts (plus or minus 10 percent) and 220 volt (plus or minus 10 percent), multiple frequency, 50 and 60 Hz (plus or minus 2 Hz). The unit shall be supplied with a UL-approved three-wire ground line cord and a 110 volt green dot hospital grade male plug. Carrying Case. rugged, shock resist

9、ing carrying case with handle. The case shall offer a protective cover for the control panel and be capable of housing all accessory components including Instruction data. The unit shall be provided with 2 sets of A list of high mortality The audiometer shall be capable of operating The audiometer s

10、hall be contained in a 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-. O a a A-A-53777 65 977777q 0031875 3-! A-A-5 3 7 7 7 Calibration. Using the methods described in ANSI S3.6, the audiometer shall be calibrated to conform with specified requir

11、ements. A certificate of calibration shall be provided with the unit. Workmanship. which detract from its appearance or impair its serviceability. The audiometer shall be free from defects Unit. Each (EA). One audiometer, as specified, constitutes one unit. Quality Assurance Provisions. the contract

12、 or purchase order, the contractor is responsible for the performance of all inspection requirements as specified herein. Except as otherwise specified in the contract or purchase order, the contractor may use his own or any facilities suitable for the performance of the inspection requirements spec

13、ified herein, unless disapproved by the Government. Government reserves the right to perform any of the inspection set forth in the specification where such inspections are deemed necessary to assure supplies and services conform to prescribed requirements. Records. for the contractor shall be maint

14、ained by the contractor and made available to the Government upon the Governments 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

15、 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. performed on the audiometer when a first article sample is required.

16、tests. power voltage and frequency. Responsibility for inspection. Unless otherwise specified in The Records of examinations and tests performed by or First article inspection. First article inspection shall be This inspection shall include the examination and all All tests are to be performed using

17、 each specified input 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-I_._- _I_ A-A-53777 65 7777774 0033876 5 Quality Conformance Sampling. A-A- 5 3 7 7 7 I Sampling for inspection. testing shall be conducted in accordance with MIL-STD-105, with a

18、n inspection level of S-2 and an AQL of 1.5 (percent defective). The unit of product for sampling purposes shall be one audiometer. Sampling for examination and Quality conformance inspection. Quality conformance inspection shall include the examination and tests specified herein. Examination and Te

19、sting. Examination. The audiometer shall be examined to determine compliance with the requirements of this specification in accordance with the defects listed below. Defects Any component part including accessories missing, broken or otherwise unusable. Exposed edge not free of burrs or sharpness. I

20、dentification marking not complete, permanent, and legible. Finish not free of chips, cracks, scratches and other appearance defects. Any component not secured in place. Testing. Testing shall be conducted to determine compliance First article testing requires all with specified requirement. tests l

21、isted herein. Quality Conformance testing requires the first three tests at all the specified voitages and frequencies. Testing shall be performed after a 30 minute warm-up period. Testing shall be conducted in accordance with the methods outlined in ANSI S3.6. 4 Provided by IHSNot for ResaleNo repr

22、oduction or networking permitted without license from IHS-,-,-b A-A-53777 65 m 7977774 0031877 7 - Air Conduction Tests. 1. 2. 3. 4. 5. 6. 7. 8. 9. Tests Headband provided is adequate to hold the earphones against the ears to provide a satisfactory seal. Each of the frequencies generated are within

23、three percent of the indicated frequency. Sound pressure level of any harmonic is at least 30 dB below the sound pressure level of the fundamental. Dial readings of hearing threshold levels have a minimum range of from O dB to the values given in Table II (ANSI S3.61, by intervals of 5 dB or less, w

24、ith the O dB setting at each frequency corresponding to the reference threshold sound pressure levels stated under defects. The sound pressure produced by an earphone as referred to the standard reference level does not differ from the indicated value of sound pressure level at any reading of the he

25、aring threshold level dial by more than 3 dB at indicated frequencies of 250 to 3000 Hz inclusive, by more than 4 dB at 4000 Hz, nor by more than 5 dB at frequencies above or below this range. Any sound from the test earphone, other than the desired test signal, is not of a magnitude as to affect th

26、reshold judgement. Any signal from the earphone not being used for test purposes has a sound pressure level at least 10 dB below the hearing threshold reference level, except that it need not be more than 70 dB below the signal from the “on” earphone. Any sound due to the operation of the audiometer

27、 controls during the actual listening test is inaudible at each setting of the hearing threshold level dial up to and including 50 dB. Tone switch operation does not produce audible transients of extraneous frequencies. 10. Rise and fall times are as specified in ANSI S3.6 paragraph 4.5. Provided by

28、 IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-i 11. Steady output voltage level in the tone switch “off“ position is at least 50 dB below its steady voltage in the “on“ position, on at least 10 dB below that corresponding to the zero Hearing Threshold Level,

29、whichever is higher. Bone Conduction Tests. At any test frequency of 2000 Hz or lower and as far as possible at higher frequencies, the bone vibrator does not radiate sound to such an extent that the sound reaching the ear by air conduction impairs the validity of the bone conduction measurement. Th

30、e headband provided holds the bone vibrator in position. Each of the frequencies generated are within three percent of the indicated frequency. The masking sound is at least sufficient to mask the tones produced when the dial reading is 40 dB hearing threshold level at 250 Hz, 50 dB at 500 Hz, and 6

31、0 dB at 1000 Hz and higher test frequencies. Contractor certification. The contractor shall certify that the product offered meets the salient characteristics of this description and conforms to the producers own drawings, specification, standard, and quality assurance practices. The Gcvernment rese

32、rves the right to require firoof of such conformance prior to first delivery and thereafter as may be otherwise provided for under the provisions of the contract. Metric Products. Products manufactured to metric dimensions will be considered on an equal basis with those manufactured using inch-pound

33、 units, providing they fall within the tolerances specified using conversion tables contained in the latest revision of Federal Standard No. 376, and all other requirements of this document are met. If a p dimensi units, .educt is manufactured to metric dimensions and those ons exceed the tolerances

34、 specified in the inch/pound a request should be made to the contracting officer to determine if the product is acceptable. The contracting officer has the option of accepting or rejecting the product. 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-

35、,-A-A-53777 65 m 777777Li 0031879 O m A- A- 5 3 ? 7 7 Regulatory requirements. Federal Food, Drug and Cosmetic Act. If the product covered by this document has been determined by the U.S. Food and Drug Administration to be under its jurisdiction, the offeror/contractor shall comply, and be responsib

36、le for compliance by its subcontractors/suppliers, with the requirements of the Federal Food, Drug and Cosmetic Act, as amended, and regulations promulgated thereunder. In addition, the offeror/contractor shall comply, and be responsible for compliance by its subcontractors/suppliers, with the requi

37、rements of all other applicable Federal, State, and local statutes, ordinances, and regulations. Recovered materials. The offeror/contractor is encouraged to use recovered material in accordance with Public Law 94-580, as amended, and as implemented by Federal Acquisition Regulation Subpart 23.4 to

38、the maximum extent practical. Preservation, packaging, packing, labeling, and marking. Unless otherwise specified, preservation, packaging, and packing shall be to a degree of protection to preclude damage to containers and/or contents thereof under normal shipping conditions, handling, etc., involv

39、ing shipment from the supply source to the receiving activity, plus reshipment from receiving activity, and shall conform to applicable carriers rules and regulations. Intermediate and exterior package quantities and labeling and marking shall be as specified in the contract and/or order. NOTE 1: Th

40、e following National Stock Number is covered by this document : NSN 6515-00-926-1520 ITEM IDENTIFICATION AUDIOMETER, MANUALLY OPERATED, PORTABLE, 110/220 Volt, 50/60 Hz NOTE 2: The audiometer shall be compatible with Patch Cord and Audiometer Booth (NSN: 6515-00-065-9600). The audiometer booth has a

41、 jack panel which includes: six 3-wire phone jacks, one cinch jones 303 connector and one cinch jones 304 connector. Ordering data. Intermediate/exterior package quantities and labeling and marking must be specified in the contract and/or order . 7 Provided by IHSNot for ResaleNo reproduction or net

42、working permitted without license from IHS-,-,-I c_I_ _-_ A - A - 5 3 77 7 b-0- A- A- 5 3 7 7 7 MILITARY INTERESTS: Custodians: Preparing Activity: DoD-MB Army - MD Agent: Navy - MS Air Force - 03 CIVIL AGENCY COORDINATING ACTIVITIES: VA- OS S PHS FDA-MPQAS DLA-DM Project No. 6515-4288 8 *US. GOVERNMENT PRINTING OFFICE: 1989 - 604-a33/11585 , Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-