Tyco 579-769 specifications Applying the Methods, ITool Office Space Example

Applying the Methods

Design Examples

Example 1:

Office Space

The following examples illustrate the design methodology outlined earlier in this chapter.

For these examples, computer based modeling was employed using Tyco Safety Products “iTool” to demonstrate intelligibility.

Note: See the iTool Installation and User’s Guide (579-772) for iTool installation and operation instructions. The screens in this publication were current at the time of print. The iTool software interface may appear slightly different on your system.

A common system design involves office space. These spaces are typically benign acoustically, with low reverberation times and low background noise levels. Consider a large office area with the following specifications:

•Dimensions = 340’ L x 54’ W x10’ H

•	Flooring =	Carpeted Floor Over Concrete
•	Ceiling =	Acoustic Tile
•	Walls =	Gypsum over 2” x 4”, (16” on center) and 0.375” Plywood Paneling

•Ambient Noise = 55 dB (Typical background noise for an office setting). This information is entered into the iTool:

Figure 6-1. iTool Office Space Example

The following basic results are attained from the iTool:

•The iTool reverberation time calculator estimates a reasonable T60 time of 0.4 seconds. Modest reverberation times are to be expected in a room with acoustic ceiling tile and carpeting.

•Using an Edge-to-Edge pattern, the resulting total number of speakers is 135 tapped at 0.25 W, for a total of 34 W of audio power required.

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