Acoustic & Vibration Specifications

The following conditions must be met in order to guarantee published system noise specifications:

Vibration

The prepared site should not exceed vibration criteria D (VC-D) in any direction, vertical or horizontal, to achieve the specified performance (see Figure 1). Frequency domain analysis is the analysis methodology used for the following vibration criteria plot. The following criteria are included in the frequency domain analysis of the following vibration criteria plot:

• 1/3 Octave analysis with one second filter time constant
• Exponential averaging

The vibration criteria plot details the vibration criteria for sensitive equipment in buildings and demonstrates velocity versus frequency using 1/3 octave analysis. The plot details the allowable amplitude as a function of frequency. Amplitude is given in terms of RMS value.

Figure 1: Vibration criteria plot

Acoustic

When used with an AVH-1000 acoustic hood, acoustic noise should not exceed 85 dBC (Note “C” weighting).

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