Acoustics Bulletin Jul-Aug 2011 - Institute of Acoustics

The UK Distributor of
sales - hire - calibration
Long-Term Monitors
RELIABLE • SITE-PROVEN • QUICK & EASY TO USE
Microphone Technology
Pre-polarised microphones are standard on meters
No Polarisation Voltage required
Inherently more tolerant of damp and/or cold conditions
WS-03 Outdoor Microphone Protection
Practical, simple and effective
Site proven - years of continuous use at some sites
No requirement for dehumidifier
No complicated additional calibration procedures
Standard Tripod Mount or any 25mm outer diameter pole
Weather Resistant Cases
‘Standard’ supplied with 5 or 10m extension
‘Enhanced’ with integral steel pole
Gel-Cell batteries give 10 days battery life (NL Series)
Longer battery life, mains & solar options available
NL-31/32 (Class 1) NL-21/22 (Class 2)
Overall A-weighted sound pressure levels
Up to 99,999 measurement periods
L Aeq , L Amax , L Amin , SEL plus 5 statistical indices
Audio recording option available
Remote Control & Download Software (RCDS)
In daily use on many sites
Download data and control the meter using the GSM Network
See the meter display in ‘Real Time’ across the GSM Network
Send alarm text messages to multiple mobile phones
Automatically download up to 30 meters with Auto Scheduler (ARDS)
NA-28 (Class 1)
• Octaves & Third Octaves
• Audio Recording Option
Vibra/Vibra+
• Logs PPVs for up to 28 Days
• Designed for Construction & Demolition
• Sends Alarms and Data via GPRS (Vibra+)
VM-54
• Measures and Logs VDVs
• Perfect for Train Vibration
• FFT Option Available
Data Handling
• You can always get the data from a
• Data stored as CSV files to Compact Flash
• Specialist download leads/software not needed