NoiSee vs Decibel

Measuring sound is what we do. NoiSee — Worthy of the name "Sound Level Meter" NoiSee is an intuitive professional-grade sound level meter for iPhone and iPad. It features all the tools expected from a professional ANSI or IEC compliant Sound Level Meter. All filters, averaging modes and statistics meet or exceed class 2 requirements of the relevant ANSI and IEC standards. NoiSee is specifically designed for Occupational Health and live-sound measurements. It was created by a team with over 20 years of experience in calibration, owning a Sound Level Meter calibration laboratory meeting ISO 17025 requirements. The same calibration equipment was used to develop this app. IMPORTANT NOTE Supported devices with a calibrated and frequency-response-compensated internal microphone: iPhone 12 mini, 12, 12 Pro Max, 13, 15, 16 Plus, 16e, 17 Pro Max, iPhone Air; iPad (9th gen), iPad (10th gen). The app also includes parameters and UI optimised for live events and live audio monitoring, including running LAeq (5, 10, 15 and 20 min averaging intervals). The initial calibration is determined by testing in an anechoic chamber meant for calibration of professional Sound Level Meters. We do not recommend changing it on supported devices, as internal microphone sensitivity varies insignificantly between units of the same model. Requires iOS 17 or later. Dynamic range approximately 40–100 dB (re. 20 µPa); frequency range 40 Hz – 18 kHz. SOUND LEVEL METER History (profile) view of all relevant parameters. Statistics view of the current measurement (ISO 1996 percentiles), also visualised as a histogram. • Time weightings: Fast, Slow, Impulse, Equivalent • Parameters: LAeq, LCpeak, LAFmin, LASmax, SPL, and more • Spectrum view: time-history of frequency- and time-weighted level. CPB analysis per IEC 61260 and ANSI S1.11, from 1/1 down to 1/24 octave. NOISE AT WORK Occupational-health compliant (ISO 9612, OSHA, NIOSH): Noise DOSE, elapsed time, LEX 8h, Projected DOSE, Time to reach 100% DOSE. Threshold, reference level and exchange rate can be set to custom values. EXTERNAL MICROPHONES Tested with MicW i436, i437 and D236, and Dayton Audio iMM-6 and iMM-6C — calibrated measurement microphones complying with Class 2 (IEC 61672). With an acoustic calibrator, NoiSee can calibrate automatically. Connect via USB-C, or via the Apple USB-C / Lightning to 3.5 mm adapter. IN-APP PURCHASES Premium octave analysis: • Non-standard time weightings (1/16 s up to 16 s) • Spectrum in 1/3 octave or finer Logging: • One-second logging of spectrum and total parameters • Profile view beyond 2 minutes • CSV export Recording: • 24-bit WAV or AAC Reporting: • PDF report export

Decibel turns your device into a powerful sound level meter without any extra hardware. Measure ambient noise in real time, monitor sound levels (dB), and explore frequencies with the built-in Spectrum Analyzer. Capture reliable sound and noise data wherever you are. Designed for casual users, audio enthusiasts, and sound engineers, Decibel works as a portable sound meter for quick sound checks or deeper audio analysis. Use it to easily check noise levels, test room acoustics, monitor workplace noise, or fine-tune audio equipment. Decibel has various advanced features, including saving and exporting noise measurement data, live sound level overlays for photos and videos, and exporting data to the Health app to track noise exposure over time. “The best way to meter sound levels” — AppAdvice SLEEP TRACKING AND SOUND RECOGNITION Decibel’s sleep tracking and smart sound recognition help you understand your sleep environment and nighttime noise. While sleep tracking is active, the app can detect common sleep sounds such as snoring, coughing, talking, and other household or environmental noise that may affect sleep quality. Each detected sound appears on a detailed sleep timeline, so you can see exactly when disruptions occurred and play back the related audio. This makes it easier to identify snoring patterns, sleep disturbances, and noise events that impact your rest. All sleep sound recognition and audio analysis are performed entirely on your device using advanced on-device machine learning. Recordings stay private, are processed locally, and never leave your device. KEY FEATURES - Visualize ambient sound levels and decibel (dB) readings in real time - Sync with the Health app to track and export noise exposure data - Add live sound level overlays to photos and videos - Save sound measurements with location data and custom labels - Record, store, export, and play back sound measurements - Export sound and noise data in CSV or audio formats SPECTRUM ANALYZER - Integrated Spectrum Analyzer with FFT and spectrogram modes - Multiple FFT sizes up to 16,384 points with selectable window functions - Flexible visualization modes and graph styles - Octave Band Real-Time Analyzer (RTA) for detailed frequency analysis EXTERNAL MICROPHONES AND CALIBRATION - Support for external microphones - Calibrate connected microphones directly in the app - Create and manage custom profiles for different microphones REPORTING AND EXPORT - Generate detailed noise measurement reports, including LAeq values - Batch export multiple measurements in supported formats Decibel app is not a replacement for professional devices and should be used for personal purposes only. By using this app, you acknowledge and agree that the developers and publishers are not liable for any decisions made based on the information provided by the app. SUBSCRIPTIONS Decibel offers optional subscriptions that unlock advanced tools and ongoing feature enhancements. With a subscription, you get access to an expanding set of professional Spectrum Analyzer features, advanced sound level weighting modes, and continued updates for compatibility with new devices and hardware. Subscriptions also include support for external microphones, unlimited saving and exporting of measurements, batch export tools, and audio and video exports with sound level overlays. Payment will be charged to your Apple account at confirmation of purchase. Subscriptions renew automatically unless auto-renewal is turned off at least 24 hours before the end of the current period. You can manage or disable auto-renewal at any time in your Apple ID account settings. By downloading and using the app, you agree to the following: Terms of Use: https://www.iubenda.com/terms-and-conditions/94359518 Privacy Policy: https://www.iubenda.com/privacy-policy/94359518 Disclaimer: http://dbmeterpro.com/disclaimer.html Questions or feedback? Contact us at support@decibelpro.app