SPL Meter vs Sound Level Meter

noiseDB is a professional noise measurement tool that helps you monitor ambient noise levels in real-time. Through precise decibel measurements, you can understand the intensity of noise you're exposed to in daily life, protecting your hearing health. The app features an intuitive gauge display, detailed noise level explanations, and recording functionality that allows you to track noise variations across different locations and times. Whether you're checking your work environment, home noise levels, or evaluating sound levels in public spaces, noiseDB is your ideal choice. Understand noise and protect your hearing with noiseDB. This app is using the standard Apple Terms of Use (EULA) https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Measure noise like a pro — straight from your iPhone. Sound Level Meter: Decibel turns your iPhone into a precision SPL meter, engineered to the IEC 61672-1 international standard. Protect your hearing, document a noise complaint, tune a studio, or pre-check a workplace - reliable readings in seconds, clean A4 PDF reports in one tap. KEY FEATURES • Real-time dB readings with A, C and Z weighting — switch on the fly • Fast (125 ms), Slow (1 s) and Impulse time integration — the modes pros use • 1/3-octave frequency analysis • Multiple live visualizations: histogram, gauge, circle meter, applause meter, basic graph • All metrics in one place: LAeq, Min, Max, Avg, Peak • Save full measurement sessions with timeline, location and notes • Calibration screen for fine-tuning against any reference meter • Available in English, French, German, Spanish, Italian, Japanese, Chinese • Distraction-free dark interface focused entirely on your data DESIGNED FOR ACCURACY Sound Level Meter: Decibel follows the IEC 61672-1 sound level meter specification: • True biquad-cascade A and C weighting filters — not generic high/low-pass approximations • Exponential averaging on squared pressure (the correct method) • Per-device calibration based on the iPhone hardware actually in use • User-adjustable offset to align with any reference meter or calibrator IDEAL FOR • Audio engineers tuning studios, venues and rehearsal spaces • Workplace safety pre-checks before a formal acoustic survey • Musicians, DJs and podcasters watching their hearing exposure • Parents monitoring nursery or kids' bedroom noise levels • Tenants documenting noise from neighbors, traffic or construction • Anyone serious about long-term hearing health FAQ How accurate is it? After one-time calibration against a known reference, expect 2–3 dB of typical accuracy in the 40–95 dB range. Maximum measurable level is bounded by your iPhone hardware (around 104–110 dB). Does it replace a certified sound level meter? For monitoring, awareness and personal documentation: yes. For legally certified acoustic measurements, dedicated class 1/2 hardware remains the reference. Can I export my measurements? Every saved session generates an A4 PDF with full stats and the timeline graph. Print it, email it, AirDrop it — anywhere PDFs work. Why do I see different values than another decibel app? iPhone microphone sensitivity varies between models, and each app handles calibration differently. Use the built-in calibration screen to align with a trusted reference. How is my data handled? Sessions are stored locally on your iPhone. Nothing is uploaded — your acoustic data stays yours. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy: https://sonometredecibelmeter.blogspot.com