NoiSee vs Decibel Shield

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 Shield™ : Sound Level Meter Discover the power of sound around you with Decibel Shield™ , the free and user-friendly app designed to make noise level measurement simple and insightful. Whether you're monitoring workplace noise, checking the volume at events, or just curious about everyday sound levels, Decibel Shield™ offers an easy-to-use solution right at your fingertips. Key Features Real-Time Decibel Monitoring: Instantly view the current sound levels in decibels (dB) with precise accuracy. Perfect for those needing an accurate dB meter. AI Assistant : Secure & On Device AI to answer questions about your recordings. Requires Apple Intelligence Capable Device. Historical Data Tracking: Keep a log of all your measurements with date and time stamps for future reference. Apple Health App Integration: Save sound levels to iOS health app to track historical levels. White Noise Generator: Listen to different sounds including white,brown,blue noise and more. Trends View: Provides insights into your sound level measurements over different periods. Explore various statistics and trends to better understand your sound environment. Location Tagging: Record the location of your measurements, ideal for comparing noise levels across different places. Max and Average dB Readings: Alongside real-time data, view the highest and average decibel readings of each session. Background Processing: Measure sound levels even when the app is running in the background. VU Meter Visual Representation: A dynamic VU meter provides a visual understanding of current noise levels. Important Notice The sound level measurement provided by this app is for informational purposes only. While we strive to ensure the accuracy of the measurements, we cannot guarantee that the results are entirely precise due to various factors such as device calibration, microphone quality, and environmental conditions. By using this app, you agree to the following: No Guarantee of Accuracy: The measurements and results provided by this app are not guaranteed to be accurate and should not be relied upon for critical or professional purposes. User Responsibility: Users are solely responsible for the interpretation and use of the data provided by this app. We strongly recommend using professional sound level meters and consulting with qualified professionals for accurate measurements and health-related concerns. Limitation of Liability: The developers, owners, and affiliates of this app shall not be held liable for any damages, injuries, or adverse effects resulting from the use or misuse of the app or the reliance on the data provided. This includes, but is not limited to, direct, indirect, incidental, and consequential damages. Health and Safety: If you have any concerns about noise levels and their impact on your health, please consult with a medical professional or an accredited specialist in sound measurement and acoustics. Visit NIOSH website for more. By downloading and using this app, you acknowledge that you have read, understood, and agreed to this disclaimer. Decibel Shield™ Premium Subscription Information: Joining the Decibel Shield™ Premium Subscription may at times enables a 7-day free trial followed by a monthly membership fee. • Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. • Account will be charged for renewal within 24-hours prior to the end of the current period. • Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase. • Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription, where applicable. Privacy Policy : https://appstack.wixsite.com/apps/policies Terms of Service : https://appstack.wixsite.com/apps/terms