Products

NTi Audio

NTi Audio M2340 Measurement Microphone

600 040 230 (NT-M2340)

Brand
NTI Audio
RRP: POA
 
 
Quantity In Cart:  
Unit of Measure
EACH

 

1 Year
Technical Specifications
Brands NTi Audio
Application Building acoustics
Application Environmental noise
Application Live sound FOH
Application Live sound level monitoring
Application Live sound PA rental
Application Occupational noise
Application Reverberation RT60 measurement
Application Room acoustics
Application STIPA
Device Type Measurement Microphones
Meter Class Class 1
Meter Class Class 1 Type Approved
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The new M2340 measurement microphone is a further development of the M2230, compatible with the XL2 and also a Class 1 measurement microphone. In addition, the M2340 features self-verification circuitry and consumes significantly less power than the M2230.

System Self-test (CIC)

Stand-alone, remote-controlled measurement stations are usually employed for long-term level monitoring. Over time, in reality, damage to the monitoring microphone, such as from vandalism, storm damage or animal attacks, can occur.

Thanks to the System Self-test (Charge Injection Check – CIC) in the new M2340 microphone, the proper functioning of the system can now be periodically remotely verified and documented.

m2340 cic visualisation
Visualisation of the System Self-test (CIC)
 

An internal precision generator in the MA230 – this is the microphone preamplifier in the M2340 – produces two square-wave signals with the fundamental frequencies 46.9 Hz and 375 Hz. Including the harmonics of these square-wave signals, the test signal covers the entire spectrum up to 20 kHz. The generator is controlled via the ASD (Automatic Sensor Detection) data link to the microphone.

The test signal is capacitively coupled to the input of the MA230 preamplifier and attenuated by the capacitance of the microphone capsule. Before starting the measurement series, the reference spectral levels are recorded so that later measurements can be compared with this reference. If a capsule is damaged, its capacitance changes, which consequently leads to a change in the microphone signal level. This signal now passes through the preamplifier, the connecting cable and the input stage of the measurement instrument, where it is digitized and evaluated.

With the Remote Measurement interface, the XL2 makes available all commands to control the M2340 and to query the measured values, while the monitoring system – e.g. NoiseScout – takes care of the recording of the reference spectrum, the regular verification and the alarming in case of a significant level change or error.

Power consumption massively reduced

Low-noise circuitry has a low impedance and therefore consumes more power. Therefore, a good compromise between power consumption and low noise is always sought, and this has been achieved very well in the new M2340: compared to the M2230, the current consumption has been reduced by 66% to 0.8 mA. The noise floor increases by only 1 dB, while the maximum processable sound pressure level has been increased by 1 dB. This makes the M2340 most suitable for power-saving applications such as long-term measurement stations.

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All items purchased from Amber Technology will be covered under warranty. The duration and terms of this warranty are specified by the manufacturer unless otherwise stated. Warranty information is available on the individual product listings on this site.

Refurbished items will include a 12 month warranty unless otherwise stated.

Please contact us if you have received an item which has been damaged in transit or is otherwise not working correctly when you receive it. Subject to availability, we will arrange for a replacement item to be despatched and for the faulty item to be returned to us. 

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Refurbished items include a 12-Month warranty unless otherwise stated.

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