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Larson Davis 824 - Qualifying Background Noise: Rooms [RTA] ID

Larson Davis 824
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11-18 824 Reference Manual 9/29/09
• Then: Stop
RT60-B
The RT60-B setup is designed to measure an RT60 by
exciting a room with impulsive noise such as a gunshot or a
balloon popping and is configured in the following way:
• Detector: Linear
• Detector Time: 0.01 seconds
• Autostore: Yes
•PreTrigger: 10
• Save ByTime: Yes
• Arm Mode: Now
• Triggering: Yes
• Trigger Source: 1 kHz
• Trigger Mode: L>
• End Mode: Time
• End Time: 3.0 seconds
• Then: Stop
Qualifying Background Noise: Rooms [RTA] ID
This ID sets up the System 824 to
measure and evaluate background
noise according to the RC and NCB
room noise criteria.
The System 824 has an Instrument Definition that makes it
easy to measure room criteria, NCB and RC, using the RTA
in 1/1 octave bandwidth. The setup is configured to take data
for 10 seconds at each location in a room. Each
measurement is automatically stored in the Autostore
ByTime history.
ROOMS.RTA is configured in the following way:

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