90.20 Apr 15, 2023
ISO/TC 43/SC 1
ISO/TS 7849-2:2009 gives basic requirements for a reproducible method for the determination of the sound power level of the noise emitted by machinery or equipment by using surface vibration measurements, together with the knowledge of the machinery specific sound radiation factor in the frequency bands. The method is only applicable to noise which is emitted by vibrating surfaces of solid structures and not to noise generated aerodynamically.
This vibration measurement method is especially applicable in cases where accurate direct airborne noise measurements, e.g. as specified in ISO 3746, ISO 3747, and ISO 9614 (all parts), are not possible because of high background noise or other parasitic environmental interferences; or, if a distinction is required between the total radiated sound power and its structure vibration generated component.
The methods described in ISO/TS 7849-2:2009 apply mainly to processes that are stationary with respect to time.
Recommendations on the selection of frequency bands are given in an annex.
90.20 Standard under periodical review
Apr 15, 2023
Acoustics - Determination of airborne sound power levels emitted by machinery using vibration measurement - Part 2: Engineering method including determination of the adequate radiation factor (ISO/TS 7849-2:2009)
60.60 Standard published
Аn opinion on draft and published standards at national, European and international level can be given at stage 40.20 Public Enquiry, 90.20 Systematic review and 95.20 Proposal for withdrawal for pure national standards.
The members of technical committees with active participation have the obligation to vote on drafts at stage 30.20 Committee voting and 50.20 Formal Vote as well.
An opinion on the document can be submitted by clicking on the "Login" button, if you have an account. If you do not have an account, you need to click on the "Login" button, then register by creating your account and return to this draft/standard.