6-channel audio analyzer with real-time signal processing
For our customer we developed a 6-channel audio analyser with real-time signal processing based on a DSP for spectral analysis of sound and vibration sensors. Every input channel supports a large number of freely configurable frequency bands as well as a configurable threshold for start of monitoring. In addition, the device also offers recording functionality via an integrated USB interface.
Compact design, an input voltage range of 8-28V, as well as an integrated overvoltage protection allow direct installation in the device under test. Furthermore, a built in super capacitor can bridge voltage drops of up 15 seconds at full operation. Compared to conventional solutions available on the market, the device is 10 times more cost effective and space-saving.
The most important parameters:
Input voltage range: 8V to 28V
Power consumption: <6W
Number of channels: 6 (BNC with ICP supply)
24 bit / 48kHz
200 freely configurable frequency bands (A-weighted and flat)
SFDR (-10dBFS @ 1kHz): 105dB
SNR (-10dBFS @ 1kHz): 95dB
Maximum input amplitude: 6.6dBV
3dB bandwidth: 20Hz – 22kHz
Crosstalk (at -10dBFs level): -90dB
Number of fieldbus: 1 (CAN / CAN-FD), 1 USB
Size: 210mm x 74mm x 170mm
Weight: approx. 1,5 kg
Efficient mathematical implementation to process data on the DSP in real-time
Complex valued FFT for spectral processing of two real valued signals
Implementation with fixed point arithmetic
Parameterizable algorithms for easy adjustment of frequency bands and thresholds
Do you have questions about this project? Martin Häusler is at your disposal.
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