Microphone Array Paddle2x24 AC Pro


24 double-layer channel system for low frequency application

This portable handheld paddle features 48 double-layered microphone channels that allow real-time acoustic near field measurements. The double-layer structure enables the measurement of acoustic pressure signals while particle velocity/acoustic intensity on the measurement plane is calculated and mapped simultaneously.



Easy to handle: the ultimate low frequency measurement tool.

The double-layered microphones act like intensity probes, delivering a vector used to calculate an acoustic map. The paddle is available as an add-on to an Acoustic Camera system or as a stand-alone solution. The calculation kernel for acoustic near field calculations is embedded in NoiseImage.

The design of the paddle is lightweight and allows for easy handling. The array body is designed as slim as possible, ensuring accurate microphone positioning. The wiring of the microphones is enclosed in and protected by the array body which guarantees the best possible acoustic transparency to measure accurate sound levels. Additionally, the array design effectively minimizes partial reflections and resonance effects between the measured object and the array. Furthermore, the microphone layout facilitates a differentiation between noise sources on the measurement plane and in the field behind the paddle.

The built-in studio microphones have an extremely linear frequency response. All are carefully hand selected and calibrated to ensure stable sound pressure levels (+/- 0.5 dB). To allow long distances, the array is connected to the data recorder via two differential SymBus microphone connector cables (max. 20 m). The array comes with an integrated fixed focus Ethernet camera with a wide angle lens. The included high-end Manfrotto tripod allows a set up in almost any measurement environment imaginable. Array and tripod are supplied in a transport case and bag respectively.

Technical Data

Array body dimensions 34 x 32 x 16 cm
Weight 1.2 kg
Video camera Baumer VCXG-25C (wide-angle lens)
Resolution 1920 x 1080 (Full HD)
Microphones Electret condenser capsule
+ special designed preamplifier
Frequency response 20 kHz – 60 kHz (< 15 dB)
20 Hz – 15 kHz (< 0.5 dB)
10 Hz – 20 kHz (< 3 dB)
Max. sound pressure level 130 dB at 3 % THD
Noise level 27 dB(A)
Sensitivity 20 mV/Pa
Channels 48 (24 intensity probes)
Recommended measurement distance > 0.1 m
Acoustic mapping range 23 dB – 130 dB
Recommended mapping frequencies 30 Hz – 2 kHz
Dynamic range 9 dB – 23 dB
Ingress protection code IP20
Cable length to data recorder up to 20 m (on request: 50 m)
Operating environment 0 °C – 45 °C, up to 80 % RH


ACOUSTIC CAMERA: Real-time intensity mapping for low frequencies

This is an example of the real time near field approach for the Acoustic Camera. With that method we aim to close the gap to the lower frequencies which are normally in the far field (Beamforming) approach very difficult to resolve. The example shows two coherent sine sources (two speakers) with 300 Hz, 100Hz, 50 Hz and 30 Hz easily separated by the new mapping algorithm. The displayed algorithm is an intensity induced localization method which will be completed with the help of the Sensound LLC (from the United States). The microphone array can be used with and without the camera in combination with the mcdRec data recorder.


Paddle2x24 AC Pro Acoustic Camera Datasheet

Acoustic Camera Overview. The Original.

Acoustic Camera. Listening With Your Eyes.

Engineering, Consultancy, and Solutions Provider
Engineering, Consultancy, and Solutions Provider

Copyright © – 2023 mitssolutions.asia
Website Design Malaysia