EMSBK | Blast Overpressure Vibration Test Microphone | TYPE AU - 8381 Get latest price

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Enable compliance of blasting activities

Outdoor microphone Blast Overpressure Microphone Type AU–8381, when connected to EMS Brüel & Kjær’s Vibration Monitoring Terminal Type 3680 (VMT), enables measurements of blast overpressure simultaneously with vibration to enable compliance monitoring of blasting activities around mines.

For mining staff and noise and vibration consultants measuring the impact of blasts around mines, the blast overpressure microphone, when used with the VMT, provides a durable and robust solution that, unlike many other industry-standard solutions, continues to meet the ISEE requirements even after being used for a long time in the field. In addition, the VMT with this microphone is a complete, robust and reliable blast monitoring solution that is easy to operate.

The combination fully meets the requirements of the International Society of Explosive Engineers, ISEE 2017 for ground vibration and blast overpressure monitoring.

Specifications

AU--8381 Sensor: ½” microphone with stainless steel diaphragm

Microphone Noise Floor:75 dB (112 mPa)

Microphone Maximum input: 160 dB peak SPL (2000 Pa)

Microphone frequency range: 2 Hz to 250 Hz (-3 dB)

Accuracy: ISEE compliant

Other features

•  Windscreen 
• Anti-bird spikes 
• 3 m microphone cable 
• Field calibration with acoustic calibrator 

Environmental

• Connectors are water- and dust-proof to IP 66

With 3680 VMT Vibration Events

• Enables max blast overpressure data to be added to vibration events 

Vibration Climate

• Enables blast overpressure data to be added to 1 second logged data

Export

• Event blast overpressure signal in WAV format

With 3680 VMT and Sentinel

• Vibration alerts - Enables max blast overpressure data to be added to vibration alerts

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