NoiseLog: I Built a Sound Meter App Because My Neighbor’s Subwoofer Was Shaking My Walls

When I complained about noise to my building manager, they asked for evidence. “It’s loud” wasn’t enough. They wanted dates, times, and decibel readings. So I built an app that gives you all three — and generates a report you can actually hand to someone.

The Noise Complaint Trap

Here’s how noise complaints typically go: you’re frustrated, you call the landlord or the city, they say “we’ll look into it,” nothing happens. Why? Because verbal complaints carry almost zero weight. Without documentation — specific dates, times, duration, and measured intensity — you’re just another person saying “it’s too loud.”

Professional sound level meters cost $200+. An acoustic engineering assessment starts at $500. Most people just suffer in silence (pun intended) or escalate to a confrontation. Neither is a great outcome.

Your Phone Microphone Is Good Enough

Modern smartphone microphones are surprisingly capable. They won’t match a calibrated Type I sound meter, but for documenting noise levels in the 40–100 dB range — which covers everything from a loud TV to construction equipment — they’re more than adequate. Courts and housing authorities don’t require laboratory-grade measurements; they require consistent, timestamped records.

NoiseLog uses your phone’s microphone to capture ambient sound, processes it through a standard A-weighted decibel calculation, and displays the result in real time.