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for structure-borne
sound detection

Electronic stethoscope to detect the ball bearing,
rolling bearing noise or when turning, milling or grinding.

The system contains a directional microphone MI10, a monitor amplifier AV14, dynamic headphones, an accelerometer and a carrying case.


  • Acoustic and Vibration Measurements
  • Source Location
  • Machine Diagnosis
  • Structure-borne sound location

Scope of delivery

  • 1-Channel Monitor Amplifier and Charge Amplifier AV14
  • AC Adapter, 100-240 VAC / 12 VDC
  • 1/4″ Directional Microphone MI 10
  • Accelerometer
  • Headphone KH 10
  • Carrying Case
  • Manual

Electronic Stethoscope ES-12
AV14 Monitoring probe


Electronic Stethoscope ES12 for locating sound sources.


Application in the grinding industry:

Contact detection of the grinding wheel with a rough diamond.


AV14 Charge and IEPE Amplifier

The 1-channel charge amplifier AV 14 has been constructed mainly to monitor acoustic and vibration signals. 

It has a measuring channel for an electret condenser microphone or a piezoelectric accelerometer. 

The switching over from the accelerometer to the microphone comes automatically, when the microphone mini-jack is plugged in at the output socket you get a voltage proportional to the acceleration or sound pressure independent of the amplification of the headphone amplifier. 

So the instrument can be used as a front end for analyzers or similar instruments.


  • electret condenser microphone Input
  • Piezoelectric accelerometer input
  • Adjustable Headphones output
  • Preamplifier Function (additional output)

MI10 Directional Microphone - Features

  • Shapely matt black plastic housing and swan neck
  • Built-in windscreen
  • Background noise elimination
  • Functional small and handy design

KH10 Dynamic Headphone

KH10 is a closed dynamic headphone and it is designed for critical music and sound monitoring in an open environment. The headphone features a frequency response of 5 Hz to 30 kHz and is equalized to the diffuse sound field. The single-sided 3 m connecting cable is equipped with an in-line volume control for optimum set-up. It is fitted with a gold-plated mini stereo plug (3.5 mm) with a 1/4″ (6.35 mm) adapter and is therefore suitable for use with almost all headphone amplifiers.
The rugged headband construction has been strengthened to give the headphone a very secure fit, matched with mechanical reliability. Soft ear pads that are easy to clean and adjustable, sliding earpieces ensure listening comfort during extended periods of use.


  • Closed diffuse field headphone
  • Excellent ambient noise attenuation (better 35 dB A)
  • Superb audio quality with high sound pressure level (105 dB)
  • Robust spring steel headband
  • Single sided cable (straight cable, 3 m long) with in-line volume control
  • Gold plated jack plug (3.5 mm) and adapter (6.35 mm)
Electronic stethoscope price
products free from planned obsolescence
ROGA Instruments products are free from planned obsolescence, technically accessible, durable and repairable.
ES12 Set

1-channel monitor amplifier and charge amplifier AV14
AC adapter, 100-240 VAC / 12 VDC
1/4″ directional microphone MI 10
accelerometer KD37
sensor cable 1.5 meter
headphones KH 10
carrying case

3245 €

1-channel monitor amplifier and charge amplifier AV14
AC adapter, 100-240 VAC / 12 VDC
accelerometer KD37
sensor cable 1.5 meters

1820 €
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