Report on Isolation of grage door with UniBrace · a garage door drive unit. Conducted by: Matt...
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Kinetics Noise Control, Inc Confidential 3/14/2012 Effectiveness of UniBrace: Isolation of the Drive Unit of a Garage Door Opener Purpose for experiment: To measure effectiveness of the UniBrace for Isolating structure-borne noise from a garage door drive unit. Conducted by: Matt Golden Basis experimental setup: A single family residence was located with a bedroom directly above the garage. The garage had an automatic garage door opener installed. Acoustical measurements were obtained in the bedroom while the garage door was opened when the garage door opener was directly attached to the structure and when it was isolated by two Kinetics Noise Control IsoMax UniBrace-L brackets. Measurements were obtained with: BSWA MP253 – ½” free field microphone BSWA MA211 – ICP preamplifier OROS 34 – 4 channel analyzer The analyzer was set to record 1/3 octave band sound pressure levels once every second. The L eq for each event was then calculated. Pictures: Figure 1: Direct - attached garage door opener
Transcript of Report on Isolation of grage door with UniBrace · a garage door drive unit. Conducted by: Matt...
Kinetics Noise Control, Inc Confidential 3/14/2012
Effectiveness of UniBrace:
Isolation of the Drive Unit of a Garage Door Opener
Purpose for experiment: To measure effectiveness of the UniBrace for Isolating structure-borne noise from a garage door drive unit.
Conducted by: Matt Golden
Basis experimental setup: A single family residence was located with a bedroom directly above the garage. The garage had an automatic garage door opener installed. Acoustical measurements were obtained in the bedroom while the garage door was opened when the garage door opener was directly attached to the structure and when it was isolated by two Kinetics Noise Control IsoMax UniBrace-L brackets.
Measurements were obtained with:
� BSWA MP253 – ½” free field microphone � BSWA MA211 – ICP preamplifier � OROS 34 – 4 channel analyzer
The analyzer was set to record 1/3 octave band sound pressure levels once every second. The Leq for each event was then calculated.
Pictures:
Figure 1: Direct - attached garage door opener
– 2 – March 14, 2012
Figure 2: Isolated garage door opener by IsoMax UniBrace L brackets
Data:
Garage Door Isolation by UniBrace in Bedroom Directly Above Garage
1/3 Octave Band Data
20
25
30
35
40
45
50
55
60
20
25
32
40
50
63
80
100
125
160
200
250
315
400
500
630
800
1000
1250
1600
2000
dBA
Freq (Hz)
SPL (dB)
Hard Attached
Drive Unit Isolated
– 3 – March 14, 2012
Garage Door Isolation by UniBrace in Bedroom Directly Above Garage
Ocatave Band Data
20
25
30
35
40
45
50
55
60
6532
63
125
250
500
1000
2000
dBA
Freq (Hz)
SPL (dB)
Hard Attached
Drive Unit Isolated
Octave Band
Center Freq
(Hz) Hard Attached
Drive Unit
Isolated Max Backgroud Improvement
32 61.7 55.8 43.9 5.9
63 56.7 53.5 44.9 3.3
125 59.7 53.9 44.9 5.8
250 53.9 43.6 35.5 10.2
500 42.3 38.1 32.2 4.2
1000 31.8 29.7 27.0 2.1
2000 26.8 27.5 27.2 -0.7
dBA 48.3 41.6 35.2 6.7
– 4 – March 14, 2012
1/3 Octave
Band Center
Freq (Hz) Hard Attached
Drive Unit
Isolated Max Backgroud Improvement
20 58.6 56.0 45.1 2.6
25 59.1 50.4 40.1 8.7
32 52.7 50.9 40.7 1.8
40 56.8 51.7 35.3 5.1
50 46.8 44.9 33.6 2.0
63 51.4 47.1 35.8 4.3
80 54.5 51.5 44.0 3.1
100 50.9 46.3 41.8 4.7
125 58.6 52.0 40.8 6.6
160 48.9 46.5 35.3 2.5
200 46.2 42.1 31.1 4.1
250 52.7 35.7 29.0 17.0
315 42.3 34.9 31.7 7.4
400 41.0 33.8 28.9 7.2
500 34.1 33.3 29.1 0.8
630 32.8 32.9 27.0 -0.1
800 29.6 26.0 21.8 3.7
1000 25.5 26.1 22.6 -0.6
1250 23.5 21.2 22.1 2.3
1600 21.7 23.4 22.2 -1.6
2000 21.4 21.5 22.6 -0.1
dBA 48.2 41.6 35.1 6.6
Conclusion:
• The Kinetics Noise Control IsoMax UniBrace-L can be effectively used to isolate structure-borne noise from a garage door opener.
