1dB Live

1dB Live turns the phones and tablets you already carry into a professional sound measurement rig — a full acoustics lab in your pocket, and a live view of every room from one screen. MEASURE • Live SPL with A, C and Z frequency weighting (dBA / dBC / dBZ) • FAST (125 ms) and SLOW (1 s) time weighting, per IEC 61672 • Min, max, average, peak and LCpeak holds • Leq — equivalent continuous level, with a selectable window • SEL — sound exposure level • L10 / L50 / L90 statistical percentiles • Noise dose (%) against NIOSH, OSHA and EU criteria • Overload and clipping warnings, plus a plain-language level category ANALYSE • 1/3-octave Real-Time Analyzer • Scrolling spectrogram — frequency over time • Live dominant frequency, with session min and max • Crest factor, for how peaky the signal really is • Live history graph of level over time ROOM ACOUSTICS • RT60 reverb time • Averaged room response across 1/3-octave bands • Feedback finder — catch the frequency that is ringing TOOLKIT • Signal generator — sine, white noise and pink noise • Instrument tuner with an adjustable A4 reference • Metronome • Vibration meter, using the device accelerometer 1dB LIVE — EVERY ZONE ON ONE SCREEN Put a session on screen at the mix position and let the room join by scanning a QR code. Each phone becomes a zone — Balcony, Lobby, Stage, wherever you set it down — and streams its readings to a shared desk dashboard about once a second. • Watch every zone live, each with level, trend, spectrum and full statistics • Drop zones onto a floor plan and read the venue by colour • Scrub the timeline to see how zones tracked against each other • Predictive alerts warn you as a zone trends toward its ceiling, not after it has passed it • Reset stats, start recordings, or make a phone buzz so you can find it — all from the desk • Share a read-only web board so production or a noise officer can watch without installing anything • Phones on the same Wi-Fi stream straight to the desk over the local network ACCURACY • USB measurement-microphone support (Dayton Audio iMM-6C) with per-serial calibration • Manual calibration offset to match a reference meter or a 94/114 dB acoustic calibrator • USB audio output routing for test tones • Each zone shows its calibration status, so you know which numbers to trust REPORTS • Record a session and save it as a report • Export CSV and PDF, with venue and notes • Record remotely on any joined device from the desk BUILT FOR Sound engineers, AV and production crews, acousticians, safety and occupational-health officers, venue and facilities managers, teachers, musicians and anyone who needs to know how loud it actually is. ALSO AVAILABLE Run the desk in a browser at 1db.live, or natively on Windows (beta). PRIVACY All audio is analysed in real time on your device. Nothing is recorded, saved or transmitted — when you join a live session, only numeric measurement data is sent, never audio. No account is required. No advertising SDKs, no analytics and no cross-app tracking. Note: 1dB Live is a professional measurement aid, not a certified Type 1/2 instrument. Accuracy depends on your device microphone and calibration. Built-in mics are excellent for trends, comparisons and finding problems; for calibrated absolute SPL, use a measurement microphone with its calibration file.

• Frequency Response: real levels in dB SPL or dBFS, like REW. A new PDF report holds every chart; Share adds a REW-ready response file and the impulse response as a WAV. • Saved sweeps keep the whole measurement: open one to see every chart again. • Choose where the sweep plays: Auto, USB jack or speaker. • Fixed: distortion (THD) readings, and short reverb (RT60) times. • Reports: clearer time axis; Leq labelled by weighting. CSVs now export correctly in every language.