SoLoud

SoLOUD — Real-Time Sound Level Meter & Noise Dose Tracker

How loud is your world? SoLOUD turns your iPhone into a precision sound level meter that measures decibel levels in real time and tracks your cumulative noise exposure using NIOSH safety standards. Whether you're at a concert, on a job site, in a classroom, or just curious about the noise around you, SoLOUD gives you the data you need to protect your hearing.

REAL-TIME DECIBEL MONITORING

SoLOUD samples audio 20 times per second for fast, accurate readings displayed on an animated circular gauge. Watch your sound levels update live with smooth transitions and color-coded indicators that shift from green to red as volume increases. Track your current, peak, minimum, and average decibel levels at a glance.

NIOSH NOISE DOSE TRACKING

Noise damage is cumulative. SoLOUD calculates your noise dose using the NIOSH formula, where 100% equals 85 dB sustained over 8 hours. Monitor both your current session dose and your daily cumulative dose with visual progress bars that change color as you approach unsafe levels. The app displays your maximum safe exposure time so you always know how long you can stay before risking damage.

SEVEN LOUDNESS CATEGORIES

Every reading is classified into one of seven categories — Silent, Quiet, Moderate, Loud, Very Loud, Dangerous, and Extreme — each with a clear safety assessment and recommended exposure limit. You'll never have to guess whether your environment is safe.

INSTANT SAFETY ALERTS

When noise levels cross into dangerous territory, SoLOUD responds immediately with visual danger warnings including a pulsing red overlay and on-screen hearing damage risk alerts. The app makes it impossible to ignore unsafe conditions.

SESSION HISTORY & STATISTICS

Every monitoring session is automatically recorded and saved. Review detailed statistics for each session including minimum, maximum, average, and peak decibel readings. See exactly how much time you spent in each loudness category with color-coded breakdown bars. Track your noise dose percentage per session and identify patterns in your noise exposure over time.

60-SECOND SIGNAL TRACE

A live waveform display plots your sound levels over the last 60 seconds with a grid overlay, giving you a visual history of recent noise fluctuations. Spot sudden spikes and sustained loud periods at a glance.

FULLY CUSTOMIZABLE

Adjust SoLOUD to fit your needs. Configure the display refresh rate from realtime to relaxed. Calibrate the meter with a -20 to +20 dB offset to match your device. Set your own danger threshold. Toggle meter smoothing, screen-on behavior, and auto-start monitoring. Turn visual effects on or off to suit your preference.

CYBERPUNK INTERFACE

SoLOUD isn't just functional, it looks the part.

BUILT FOR REAL USE

- Musicians monitoring stage and rehearsal volume
- Construction and factory workers tracking job site noise
- Parents checking noise levels in nurseries and classrooms
- Event organizers managing venue sound
- Audio engineers verifying output levels
- Anyone who wants to understand and protect against noise exposure

KEY FEATURES

- Real-time decibel meter with 20 Hz sampling
- Noise dose calculation (session and daily)
- Seven loudness categories with safety assessments
- Visual danger alerts with hearing damage warnings
- Automatic session recording with full statistics
- Loudness category time breakdowns per session
- 60-second live signal trace waveform
- Configurable refresh rate, calibration, and danger threshold
- Persistent session history
- Matrix rain, scanlines, and cyberpunk visual effects
- Keep screen on mode for continuous monitoring

Your hearing doesn't regenerate. Once it's damaged, it's gone. SoLOUD gives you the awareness to make informed decisions about noise exposure every single day. Download now and start monitoring.