ISO/TS 7849-2:2009给出了通过使用表面振动测量确定机械或设备发出噪声的声功率级的可再现方法的基本要求，以及对频带中机械特定声辐射系数的了解。该方法仅适用于固体结构振动表面发出的噪声，不适用于空气动力学产生的噪声。 这种振动测量方法特别适用于精确的直接空气噪声测量，例如:。 g、 按照ISO 3746、ISO 3747和ISO 9614（所有部分）的规定，由于高背景噪声或其他寄生环境干扰，不可能实现；或者，如果需要区分总辐射声功率及其结构振动产生的部件。 ISO/TS 7849-2:2009中描述的方法主要适用于相对于时间而言是静止的过程。 关于频带选择的建议见附件。

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.