Klog dB – Sound Meter

Klog dB measures the sound level around you in real time and shows the frequency content of what you hear. It is built for anyone curious about noise and for quick technical checks.

🔊 REAL-TIME dB(A) MEASUREMENT
• A-weighted measurement matching the sensitivity of human hearing (IEC 61672)
• Analog-style gauge from 0 to 120 dB
• FAST (125 ms) and SLOW (1 s) time weighting
• Live chart of the last 20 seconds

📊 MIN / MAX / LEQ
• Lowest and highest level during the measurement
• LEQ: equivalent continuous sound level (average sound energy)
• One-tap reset; values are kept when you pause and resume

🚦 COLOR-CODED NOISE ZONES
• 🟢 0–50 dB: Quiet (whisper, library)
• 🟡 50–70 dB: Moderate (normal conversation)
• 🟠 70–85 dB: Loud (heavy traffic, busy restaurant)
• 🔴 85 dB and above: Dangerous. Prolonged exposure puts hearing at risk; the red LED on the gauge lights up at this threshold.

🎵 FREQUENCY SPECTRUM
• FFT analyzer showing which frequencies dominate a sound
• ~11 Hz resolution, linear / logarithmic frequency axis
• Live dominant (peak) frequency

👂 NOISE DOSE
• The sound energy you were exposed to, relative to the daily limit (NIOSH: 85 dB(A) for 8 hours = 100%)
• Remaining safe time if you stay in the same environment

🔔 THRESHOLD ALARM
• Set your own threshold between 60 and 110 dB
• Vibration and a red on-screen warning when it is exceeded

🕘 MEASUREMENT HISTORY
• Save your measurements: duration, LEQ, MIN/MAX, dose and a second-by-second level chart
• Saved on your device only; numbers, never audio

🎯 CALIBRATION
Phone microphones differ. Compare with a reference meter and fine-tune in 0.5 dB steps; the setting is saved on your device.

🔒 PRIVACY FIRST
• Audio is processed on your device in real time and is never recorded or stored
• The only permission is the microphone; the app does not request internet access or send any data
• The microphone is released when the app goes to the background or is paused

🌗 Light and dark themes. 🌍 Available in English and Turkish.

Note: Phone microphones are not certified measuring instruments. Readings may differ by ±3 dB from a reference meter; use a calibrated sound level meter for official or legal measurements.