ALauris

ALauris is a sound level meter built by ALgruppe, an acoustic consulting firm, for its own field work. It shows not only how loud a sound is, but how loud it is at each frequency — on one screen. ■ Real-time measurement • dB(A), dB(C) and dB(Z) side by side • FAST (125 ms) / SLOW (1 s) time weighting, with MAX hold • Display modes: Real-time, Leq, L10, L50, L90 (1–120 s analysis window) • OVER warning when the input clips ■ Frequency analysis • Spectrum with 1/3, 1/6, 1/12 or 1/24 octave smoothing • Octave bands: 1/1, 1/3, 1/6 or 1/12 octave • Spectrogram: 5, 10, 30 or 60 seconds • FFT size 1024–16384, zoom and pan, read values with a cursor ■ Calibration and external mics • Quick calibration with a 94 dB calibrator, with calibration history • USB measurement mics and audio interfaces — each input keeps its own calibration • Import microphone correction files (frequency–dB) • On Mac, choose the input device and channel directly ■ Logging and reports • A 1-second Leq log builds up automatically while measuring • Noise dose: Korea OSH Act, OSHA and NIOSH criteria • Alerts when a threshold level is exceeded • Background noise rating: NC and NR • Export to CSV and PDF ■ Themes and devices • Five purpose-built themes: Studio (analysis), Analog (needle meter), Field (logging), Report (statistics), Calm (plain-language guide) • Light and Dark modes • iPhone, iPad and Mac — on Mac, measuring continues in the menu bar after you close the window • Built-in user guide in English and Korean ■ Privacy Sound from the microphone is used only on your device to calculate levels; it is never recorded, stored or transmitted. No personal data is collected, and there are no ads or trackers. ■ Please note ALauris is not a certified IEC 61672 sound level meter; readings are for reference only. Smartphone microphones vary, so calibration is recommended. Noise dose values must not be used for legal or medical decisions.