NoiseMapper-RT (Sound-Level Meter Model NMrt)

The NoiseMapper-RT (Remote Terminal) equipment is a standalone operating remote terminal (sound-level meter), appropriate for both outdoor and indoor installation, designed by GEONICA for continuously measuring ambient noise.

Each terminal is made up by a professional high quality microphone connected to an advanced acoustic signal processing unit, completed with an electronic measurement and processed-data storage unit, provided as well with an integrated GSM/GPRS radio-modem.

Said radio-modem allows transmitting the data to a Central Ambient Noise Monitoring Station (NMC - Noise Management Center), where dynamic noise maps are prepared and presented, with reliable and precise data updated in real time, fed by the continuous measurements from all the sites where a remote acoustic terminal is installed.

Thanks to their extremely low energy consumption, the NoiseMapper-RT (NMrt) remote terminals are capable of continuously measuring and processing ambient noise, transmitting the data in real time via GPRS, powered by their own internal battery and a small solar charging panel. Optionally, it is also possible to transmit the data using Wi-Fi networks or point-to-point, or point-to-multipoint, radio links.

The combination of the NMrt remote stations network and the Central Ambient Noise Monitoring Station make up the NoiseMonitoring System, described separately.

Category:

Class 1, for the sound-level meter Model NMrt-1

Class 2, for the sound-level meter Model NMrt-2

Type of measurements:

Sound level with exponential time weighting (conventional sound-level meter).

Time-averaged sound level (integrating-averaging sound-level meter).

Sound exposure (integrating sound-level meter).

Frequency weighting:

A, C and Z all for Class 1.

Exponential time weighting:

F and Sfor conventional sound-level meter.

Integration times:

10s; 1,5,10 and 30 min; 1, 8 and 24 hours

Average parameters:

Sound pressure level: LP

Peak sound pressure level: Lpeak

Exponentially weighted sound level: LAF, LAS, LCF, LCS, LZF y LZS

Maximum sound level: Lmax

Average sound level: LAeqT, LZeqTS y LZeqT

Sound exposure level: LAE, LCE y LZE

Other technical characteristics of the NMrt
sound-level meter:

Assembly: Compact in outdoor box made of highly resistant polypropylene (IP-67 protection and 30x23x13cm dimensions).

Internal memory: 64 Mbytes, upgradeable to 128 Mbytes.

Positioning: Using an integrated, optional GPS receiver. (allows synchronising all the terminals of a measurement network, as well as referring the transmitted data to the position of each measurement point).

Auxiliary channels: 8 analog input channels for connecting eight optional meteorological sensors.

Communication ports: 4 configurable serial RS232/422/485/Ethernet ports.

Radio-Modem: GSM/GPRS or CDMA, for data transmission.

Power: Internal 12 VDC battery, rechargeable via solar panel or connection to the 220VAC grid.

Consumption: 20 mA@12V for the overall set (microphone, processor and data-storage and transmission unit).

Typical applications:

Noise measurement and monitoring in urban areas.

Noise measurement and monitoring in roads and railroads.

Noise measurement and monitoring in airports and heliports.

Ambient noise measurement networks with real time data transmission via cellular GSM/GPRS phone or RTC line.

Industrial noise measurement and monitoring.

Noise maps.

Noise dose.

Exposure to noise in specific work areas.