This standard is intended for use as a noise criteria design standard for design of military materiel, cited contractually in system specifications, and elsewhere, and for use as a basis for that part of noise testing where design characteristics are assessed for purposes of acceptance. It is not intended for use to express binding requirements in conceptual and other early acquisition phases. The standard may be applied to traditional, as well as non-developmental item (NDI) acquisitions.

This Requirement is intended for use as a steady-state noise criteria design standard for military ground materiel, cited contractually in system specifications, and elsewhere, and for use as a basis for that part of noise testing where design characteristics are assessed for purposes of acceptance. It is not intended for use to express binding requirements in conceptual and other early acquisition phases. The Requirement may be applied to traditional, as well as non-developmental item (NDI) acquisitions.This Requirement is not intended for applicability to shipboard equipment or aircraft noise (specified by Requirements 5, 6, or 7, as applicable.)

This Requirement is intended for use as an aural non-detectability design standard for military ground materiel, cited contractually in system specifications, and elsewhere, and for use as a basis for that part of noise testing where design characteristics are assessed for purposes of acceptance. It is not intended for use to express binding requirements in conceptual and other early acquisition phases. The Requirement may be applied to traditional, as well as non-developmental item (NDI) acquisitions.

This Requirement is intended for use as a community annoyance (acceleration, drive-by, stationary) design standard for military ground materiel, cited contractually in system specifications, and elsewhere, and for use as a basis for that part of noise testing where design characteristics are assessed for purposes of acceptance. It is not intended for use to express binding requirements in conceptual and other early acquisition phases. The Requirement may be applied to traditional, as well as non-developmental item (NDI) acquisitions.

This Requirement is intended for use as an impulse noise criteria design standard for military materiel, cited contractually in system specifications, and elsewhere, and for use as a basis for that part of noise testing where design characteristics are assessed for purposes of acceptance. It is not intended for use to express binding requirements in conceptual and other early acquisition phases. The Requirement may be applied to traditional, as well as nondevelopmental item (NDI) acquisitions.

This Requirement is intended to prescribe equipment acquisition testing and certain warning plate requirements and drawing and manual information requirements for shipboard equipment (see 5.10 and 5.11).

This Requirement provides requirements and verification methods for sound pressure levels in manned USAF aircraft.

This Requirement is intended to provide the baseline by which the developer as well as the user of the helicopter can establish realistic noise control during development, testing, and operation of helicopters.

This Requirement is intended to provide the baseline by which the developer and user of military helicopters can establish realistic internal sound level control during development, testing, and operational phases of the total system. It is a design standard evolved from consideration of hearing damage risk, helicopter aircrew mission profile exposure, speech intelligibility, state-of-the-art helicopter noise reduction, and the helicopter weight, performance, and cost trade-offs of acoustical treatment. This standard is neither a hearing damage risk criterion nor a hearing conservation criterion.

Requirement 6 cannot be used for contractual purposes without supplemental information relating to operational need, configuration constraints, and information contained herein. Supplemental information required is identified by blanks within the standard. A blank may be designated by the following symbol (n) and discussed as "Blank n."