scope:

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 MILSTD- 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.