ACOUSTIC FUNDAMENTALS By Mike Donovan

Sound Power Vs. Sound Pressure Sound pressure is what we hear A logarithmic formula is required to convert sound power to sound pressure In occupied space, Room Constant (RC) is utilized – the ability of a room to absorb sound based on room construction (materials in walls, ceiling, lights, furniture, floor) Outside with air cooled chillers – wall material and direction constant determine sound power to sound pressure conversion (two solid walls along two sides and open on the other) A-weighted sound power doesn’t provide enough detail

Title is 30 pt. Arial Bold (Dark Blue) and the Line Spacing is Exactly 32 pt. Heading is 22 pt. Arial Bold (Green), and the Line Spacing is Exactly 24 pt. First level bulleted items are 20 pt. Arial Regular (Gray), and the line spacing is exactly 22 pt. (with filled round bullets). 9 pts. spacing is assigned before each bulleted item. −Second level bulleted items are 18 pt. Arial Regular (Gray) and the line spacing is exactly 22 pt. (with “en-dash” bullets). First level bulleted items are 20 pt. Arial Regular (Gray), and the line spacing is exactly 22 pt. (with filled round bullets). 9 pts. spacing is assigned before each bulleted item. −Second level bulleted items are 18 pt. Arial Regular (Gray) and the line spacing is exactly 22 pt. (with “en-dash” bullets).

Title is 30 pt. Arial Bold (Dark Blue) and the Line Spacing is Exactly 32 pt. Use this slide layout when no bulleted text is needed. The text is 22 pt. Arial Regular (Gray), and the line spacing is exactly 24 pt. and 18 pts. spacing is assigned before each paragraph.

VRV Concept Heading Goes Here First level bulleted item goes here and continues if necessary. −Second level bulleted item goes here and continues if necessary.

Plenum Fan Uploading – 40.2", 20,000 CFM – 53% Turndown

Plenum Fan Uploading – 40.2", 20,000 CFM – 53% Turndown (cont’d) UNIT SOUND63 Hz125 Hz250 Hz500 Hz1000 Hz2000 Hz4000 Hz8000 Hz Radiated Unit discharge Unit return

Sample Bar Chart Created Through Excel

HTS PowerPoint Color Theme R=0 G=100 B=165 R=90 G=142 B=134 R=95 G=106 B=114 R=0 G=158 B=221 R=185 G=194 B=31 R=223 G=138 B=41 R=209 G=212 B=211 < Additional light gray color may be used; note that it is not within color theme; if needed, RGB values to be assigned manually.