Speechguard

SITE VISIT REPORT

DATE: 12/14/2004
TO: Jerry Morgan, Spirit Acoustics
FROM: Martin Alexander
PROJECT: Ortho Biotech, Bridgewater, NJ
Office Isolation Measurements Before and After
PRODUCTS INSTALLED:
A. Speech Guard Light Fixture Enclosure
B. Shield Guard Tile Enhancer

Martin Alexander, P.E.
consultant in acoustic vibration
63 Passaic Avenue
Summit, NJ 07901
908-522-9442
908-522-0361 (f)
marty.alexander@alum.mit.edu

Measurements were made with a Bruel & Kjaer Type 2250 Precision Sound Level Meter/Real
Time Analyzer to test the effect of speech guard and shield guard on the 14th of December in
2004. Measurements are summarized below.

Table 1 : Octave Band Measurements

Location 63HZ 125 HZ 250HZ 500HZ 1000 HZ 2000 HZ 4000 HZ 8000 HZ NIC
1. Third Floor Untreated 20 20 17 25 26 29 34 35 27
2. Third Floor
Treated – Speech Guard
Treated – Shield Guard

14 18 30 43 44 45 50 52 42
3. Third Floor
Treated with Shield Guard only
20 16 15 44 39 39 42 46 36
4. Second Floor
Untreated
14 18 18 23 24 31 38 43 26
5. Second Floor
Treated – Speech Guard
Treated – Shield Guard
Treated – 1″ Acoustic Wall Panels
26 25 28 37 46 52 57 54 41

End Of Report