DI-HFAC-80270A

Machinery and Equipment Airborne Sound Measurements Test Plan

The Machinery and Equipment Airborne Sound Measurements Test Plan describes the airborne sound measurements test procedure, facility, and measurement system in advance of testing to demonstrate planned compliance with MIL-STD-1474 and ANSI/ASA S12.67.

Approval DateApril 13, 2015

AMSC NumberN9536

Preparing ActivitySH

Project NumberHFAC-2015-004

OPR—

DTIC ApplicableNo

GIDEP ApplicableNo

Limitation—

Applicable Forms—

Approval Limitation—

Form Version—

DID Formatfree_text

963C CompliantYes

DISTRIBUTION STATEMENT A: Approved for public release; distribution is unlimited.

Supersedes

DI-HFAC-80270

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Description & Purpose

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Application & Interrelationship

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Use & Relationship

The Machinery and Equipment Airborne Sound Measurements Test Plan describes the airborne sound measurements test procedure, facility, and measurement system in advance of the test to demonstrate planned compliance with the applicable requirements of MIL-STD-1474 and ANSI/ASA S12.67, Pre-Installation Airborne Sound Measurements and Acceptance Criteria of Shipboard Equipment.

a. This DID shall be applied for each noise grade, class, rating, and type of equipment to be tested for airborne noise performance when invoked on each contract or order, or when MIL-STD-1474 or ANSI/ASA S12.67 is invoked in the contract specification or statement of work (SOW).

b. This Data Item Description (DID) contains the format, content, and preparation instructions for the Machinery and Equipment Airborne Sound Measurements Test Plan in response to the applicable tasks in the contract SOW.

c. This DID supersedes DI-HFAC-80270.

Preparation Instructions

1Reference documents.The applicable issue of the documents cited herein, including their approval dates and dates of any applicable amendments, notices, and revisions shall be as specified in the contract.

2Format.The Machinery and Equipment Airborne Sound Measurements Test Plan shall be prepared in Contractor's format.

3Content.The Machinery and Equipment Airborne Sound Measurements Test Plan shall contain the following information:

3.1Test and equipment information.The report shall contain the following:

3.1.1Equipment to be evaluated, including contract number.

3.1.2Ship name(s) and hull number(s), if known, for which the unit is being acquired.

3.1.3Evaluation measurements to be performed.

3.1.4Evaluating activity and test site.

3.1.5Test date, if established.

3.1.6Equipment specification acceptance criteria.

3.1.7Driven and driver unit manufacturers.

3.1.8Driver unit horsepower.

3.1.9Rated electrical characteristics, including volts, amps, and phase.

3.1.10Rated fluid media parameters (e.g., flow rates, temperatures, pressures).

3.1.11Equipment rated operational speeds (e.g., driver and driven unit revolutions per minute).

3.1.12Expected equipment noise and vibration sources and their frequencies of excitation (e.g., rotationals, gear tooth contact, blade rate).

3.1.13Resilient mount manufacturer and model number.

3.1.14Dates of manufacture of resilient mounts to be used.

3.1.15Number of resilient mounts to be used.

3.1.16If the use of non-Navy standard resilient mounts has been approved, include the characteristics including load rating in pounds and resonant frequency data of the mounts to be used.

3.1.17Planned equipment load during test (e.g., full, half).

3.1.18Planned operating speeds during test.

3.1.19Planned throttling conditions, if any.

3.1.20Planned operating suction and discharge fluid media parameters during test (e.g., flow rates, pressures, temperatures).

3.1.21Planned electrical inputs, outputs, or both during test.

3.1.22Block diagrams and identification of make and model of measurement and analysis instrumentation to be used.

3.1.23Block diagrams and identification of make and model of system calibration instrumentation to be used.

3.1.24Place and date of latest laboratory calibration of measurement instruments, system calibration instruments (including field calibrators), and analysis instruments which will be used.

3.2Drawings, sketches, and photographs.The report shall contain the following:

3.2.1Overall unit dimensions and orientation (e.g., vertical, horizontal) to be used during test.

3.2.2Identification of major components.

3.2.3Interface information.

3.2.4Mounting locations and dimensions.

3.2.5Weights and center of gravity for major components.

3.2.6Resilient mount orientation (e.g., vertical, horizontal, angle), approximate load on each mount, attachment locations, overall unit weight, and center of gravity.

3.2.7Pedestal or subbase dimensions, materials, and weight, when applicable.

3.2.8Dimensions, materials, and weight of the mounting fixture if a mounting fixture other than the standard fixture is to be used.

3.2.9Planned arrangement and description of flexible pipes and ducts, if to be used.

3.2.10Planned arrangement of test piping and fittings.

3.2.11Planned arrangement of electrical power leads.

3.2.12Planned location and description of test instrumentation.

3.2.13Planned locations of resilient mounts and pedestals or fixtures that support the equipment.

3.2.14Approximate locations and orientation of each microphone relative to equipment features.

3.2.15Locations of equipment air inlet and discharge openings.

3.2.16Description of acoustical center of sound source, assumed or measured.

3.2.17Acoustical environment (indoor).When testing indoors, the following shall be included:

3.2.17.1Description of planned location and orientation of test unit relative to floor, walls, ceiling, and contents of test room.

3.2.17.2Description of planned test location (e.g., anechoic, reverberant); dimensions of the test room or chamber; and description of the physical treatment on walls, ceiling, and floor.

3.2.18Acoustical environment (outdoor).When testing outdoors, the following shall be included:

3.2.18.1Description of planned location and orientation of test unit relative to buildings, structures, or other reflecting surfaces or objects.

3.2.18.2Description of the planned ground surface, and wind direction and speed.

3.3Tabular and graphic formats.Description of tabular and graphic formats to be used in tabulating and recording airborne sound measurement data.

References

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