Sonoscout NVH Recorder
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PRODUCT DATA Sonoscout NVH Recorder For noise, vibration and harshness (NVH) measurements Sonoscout™ is a portable, multi-channel, wireless NVH recorder from Brüel & Kjær that performs real-time recording and validation. It continuously displays test information, such as tacho channel output, to maximize confidence during testing, and brings simple control and analysis to tasks such as comparing vehicles and data sets. Sonoscout is a system comprising a control unit (an app for an iPad® running iOS) and a battery-powered data acquisition front end with wireless capability based on Brüel & Kjær’s LAN-XI hardware. A wireless connection between the front end and the control unit transmits the data from up to 12 measurement transducers to the app for recording. When used in combination with a binaural recording headset, or a head simulator, binaural recordings of cabin sounds can be captured in real time. Playback connectivity via Bluetooth® allows recordings to be audited immediately through the headset, or using the car’s audio system. Sonoscout can be used for spectral or order analysis and filtering (for validation or benchmarking of rotating machinery), and data can be exported to BK Connect® or other post-processing software for further analysis. The Sonoscout app runs on all iPad models to which data streams directly from the LAN-XI module. It supports GPS and CAN signals and recording to an SD card. It also has a demonstration feature (Virtual Front End) that allows you to try the full recording and analyzer functionality without purchasing any extra hardware. Uses and Features Uses • • • • • • General sound and vibration measurements NVH characterization Benchmarking Simple troubleshooting Recording data for NVH Simulator models Binaural recordings using Binaural Recording Headphones Types 4101-B and 4965-B or Sound Quality Head and Torso Simulator (HATS) Type 4100-D Features • Records data – up to 12 channels (iPad or SD card storage) • Stereo playback • Remote control of BK Connect Time Data Recorder for larger channel-count requirements • Narrow- and 1/3-octave band analysis (synthesized) • Spectrogram (colour maps) • Order slicing • Simple sound quality metrics • GPS tracking • Pre-triggering, auto-stop and time history markers • Overlaid displays – up to four • Target curves: create, import and display • Automated calibration procedure • Simultaneous application of high-/low-pass and parametric equalization (EQ) filters • Generates an rpm profile from a signal channel (RPM Finder) • Creates speed profiles from a GPS recording • Supports TEDS • Supports various Sonoscout app is a free d file formats: – Save data as BKC, WAV, ASQ-WAV, PTI or HDF files – Export recorded data to SDF or 2-channel WAV files – Export results as BKC, CSV or ATFX ASAM-ODS files • Intuitive touch operation • Free download of Sonoscout app in the App StoreSM • Demonstration mode in app (Virtual Front End) • Portable and battery powered • Wireless LAN (via LAN-XI Frame Type 3660-A-200/-201) • Dyn-X compatible (excl. LAN-XI Modules Type 3053, 3058, 3676 and 3677) • ASE3 input for digital head support (Type 3058 only) • High-speed CAN support: ISO 11898-2. CAN 2.0 A/B (LAN-XI Module Type 3058 only) • Low-speed CAN (fault tolerant) support: ISO 11898-3 (LAN-X

Fig. 1 Sonoscout NVH Recorder system: sensors, a LAN-XI front end and the Sonoscout control unit A typical system consists of sensors, a LAN-XI front end and the Sonoscout control unit (an iPad running the Sonoscout app). Sensors are connected to an input module, which is installed with Sonoscout Licence BZ-5950-L. The input module is mounted, together with a battery module, in a wireless frame, enabling wireless connection to the iPad. Control Unit The Sonoscout App is a free to download from the App Store and can be installed on an unlimited number of iPad mobile devices running iOS. Use...

Functionality Recording • • • • • • • • • • Setup of front end Tacho and CAN channel support with correction for missing pulses Remote control of BK Connect Time Data Recorder Auto-calibration Data recording (with pre-triggering and auto-stop options) GPS recording Peak and level meters Markers to identify specific events or sections Available Virtual Front End mode (demo mode) Recording of all CAN data for later post-processing Fig. 3 Recording – typical views Time Data Viewing and Editing • • • • • • • Display recorded time files Transfer LAN-XI Notar™ stand-alone recorder files from SD...

Analysis • Analysis using: – Autospectrum or PSD – 1/3-octave (synthesized from FFT) – Spectrogram – Order analysis (order plus overall level) • Average over selected range or instantaneous spectra • View spectra while listening – real-time 2D spectrum is displayed, synchronized to the play cursor • Create, import and display target curves • Use RPM Finder to generate an rpm profile from a single channel • Simple filtering Fig. 5 Analysis task – typical views RPM Finder This feature allows you to calculate an rpm profile from any signal channel. You identify an order by touching it at...

Sound Quality Metrics Metrics as a critical band spectrum: • Average loudness • Average sharpness Metrics as a function of time, rpm, or speed: • Average loudness • Average sharpness • Overall level • Overall level in a frequency band • Articulation index GPS Options The GPS task has the following options: • Display the X-Y coordinates of the currently opened file • Display the speed profile • Convert the GPS speed to a speed profile channel and add to the time file • Display a hybrid map with the start and end positions marked (if you have Internet connection) • Export file as a keyhole...