Tyco 579-769 Uživatelský manuál stáhnout pdf (Strana 52)

6-4

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.

Continued on next page

Applying the Methods

Design Examples

Example 1:

Office Space

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Tyco 579-769 Uživatelský manuál Strana 52