Bedrock SB41/SB42 SoundBox
The Bedrock SB41 and SB42 SoundBox are professional IoT sound level meters and noise data loggers, designed for system integrators, smart city deployments, and continuous environmental monitoring. They combine a fully certified sound level meter with flexible connectivity, making them the ideal choice for any application requiring unattended or remotely controlled acoustic measurements.
The SoundBox is controlled via the Bedrock Remote Protocol, which provides a Python API for full programmatic access to all measurement functions. This makes it straightforward to integrate into automated test systems, IoT monitoring platforms, or custom data pipelines. A Windows-based Remote Display application is also available for desktop operation.
With its compact form factor and USB power, the SoundBox can be deployed in virtually any location, indoors or outdoors, with minimal installation effort.
Functionality
- STIPA measuring (quick screening mode, pro mode, averaging mode)
- Full STI using the direct method (65 second measurement).
- Speech Level Measurements cf IEC-60268 Annex J.
- SB41: Class 1 / Type 1 sound level meter (fast, slow, impulse; A/C/Z-weighting, Leq, SEL) conforming to IEC-61672 class 1, ANSI S1.4 Type 1.
- SB42: Class 2 / Type 2 sound level meter (fast, slow, impulse; A/C/Z-weighting, Leq, SEL) conforming to IEC-61672 class 2, ANSI S1.4 Type 2.
- Statistical acoustics (L10, L90, etc)
- Real Time Analyzer (1/12, 1/6, 1/3 and 1/1 octave)
- FFT analyzer (detailed frequency analysis up to 32768 lines)
- RT60 measuring (reverberation times: T20/T30/EDT).
- Noise Curves (NR, NC, PNC, NCB, RC, RC mark II)
- THD+N
- Fundamental frequency estimation
- Building acoustics: D, R′, DnT, Dn
- Building acoustics: SRI/STC.
- Audio oscilloscope
- Long term logging and monitoring (LEQ, RTA)
- AC Volt meter for audio line level measurements (dBU, dBV, V rms)
- Calibrated audio recording
- USB audio device mode — calibrated audio for your PC-based software applications
- Full remote control via USB API (Remote Protocol, Python library included)
- Compatible with Raspberry Pi, industrial PLCs, edge computers and cloud gateways
- Headless operation: no display required for unattended deployment
- More functionality will be added through free future firmware upgrades.
Technical specifications
- 20 – 20,000 Hz frequency range
- Dynamic range 30–130 dB (with included microphone; up to 145 with attenuator sold separately)
- 16 GB of storage (of which at least 95% available for user data)
- Access to stored data and recorded audio through high-speed USB-C interface
- SB41: Complies with IEC 60268-16 rev. 4, IEC 61672 Class 1, ANSI S1.4 Type 1, IEC-62160 class 0 (RTA), ISO-3382
- SB42: Complies with IEC 60268-16 rev. 4, IEC 61672 Class 2, ANSI S1.4 Type 2, IEC-62160 class 0 (RTA), ISO-3382
- All necessary accessories (such as microphone, charger, cables, windscreen and a ruggedized waterproof carrying case) are included
The Bedrock SBxx can be bought through any of our distributors. Feel free to contact us directly if no distributor is listed for your region. The SBxx is shipped worldwide with our global 24-month pick-up and return warranty.