Show HN: Free noise evidence generator for tenant complaints

#1

Post by countfeng » Fri, Jan 09, 2026, 2:12 PM UTC

I built a free, no-registration noise evidence generator for tenant noise complaints.

Features: - Supports 27 US cities with accurate noise ordinances - Real-time recording + professional court-ready PDF reports - 100% local processing (no data upload, privacy-first) - Auto day/night noise limit detection - Completely free (10 PDF generations/day)

Why: As a tenant dealing with noise issues, I was frustrated that existing tools either required subscriptions or uploaded data to servers. This tool is: - Totally free, no hidden costs - No registration or installation required - All processing happens locally on your device

Website: https://noiseevidence.com

Feedback welcome!

Show HN: Free noise evidence generator for tenant complaints
noiseevidence.com

Re: Show HN: Free noise evidence generator for tenant complaints

#2

Post by alex_duf » Fri, Jan 09, 2026, 2:18 PM UTC

If I may give constructing feedback then, "noise evidence generator" sounds like you're creating fake noise proof to fool courts. The name needs to be revised.

"recorder" might feel less like it's inventing things.

Re: Show HN: Free noise evidence generator for tenant complaints

#3

Post by countfeng » Fri, Jan 09, 2026, 2:44 PM UTC

alex_duf wrote: post #2

If I may give constructing feedback then, "noise evidence generator" sounds like you're creating fake noise proof to fool courts. The name needs to be revised. "recorder" might feel less like it's inventing things.

Thank you for your suggestion, I will revise it!

Re: Show HN: Free noise evidence generator for tenant complaints

#4

Post by supah » Fri, Jan 09, 2026, 3:52 PM UTC

countfeng wrote: post #3

alex_duf wrote: post #2

If I may give constructing feedback then, "noise evidence generator" sounds like you're creating fake noise proof to fool courts. The name needs to be revised. "recorder" might feel less like it's inventing things.

Thank you for your suggestion, I will revise it!

was my first thought as well.

Re: Show HN: Free noise evidence generator for tenant complaints

#5

Post by uoaei » Fri, Jan 09, 2026, 4:37 PM UTC

How do we know microphones on different devices are calibrated to record the same power readings? Do you have court-ready documents to show this?

Re: Show HN: Free noise evidence generator for tenant complaints

#6

Post by sigmar » Fri, Jan 09, 2026, 4:46 PM UTC

countfeng wrote: post #3

alex_duf wrote: post #2

If I may give constructing feedback then, "noise evidence generator" sounds like you're creating fake noise proof to fool courts. The name needs to be revised. "recorder" might feel less like it's inventing things.

Thank you for your suggestion, I will revise it!

"Noise Evidence Logger" perhaps? the 'generator' in the name also made me think this was for faking proof. neat app idea

Re: Show HN: Free noise evidence generator for tenant complaints

#7

Post by waffletower » Fri, Jan 09, 2026, 4:46 PM UTC

More justification for my mortgage for my well-insulated, single family home with air and distance from my neighbors. Me and my subwoofers escape litigation facilitated by this SaaS.

Re: Show HN: Free noise evidence generator for tenant complaints

#8

Post by xnx » Fri, Jan 09, 2026, 4:53 PM UTC

uoaei wrote: post #5

How do we know microphones on different devices are calibrated to record the same power readings? Do you have court-ready documents to show this?

I've searched but failed to find anything that works as a standard fiducial-type sound. e.g. With a recording of the sound produced by the fiducial from a set distance (and knowing temperature, pressure, humidity), you could calibrate/adjust recordings.

Re: Show HN: Free noise evidence generator for tenant complaints

#9

Post by juancn » Fri, Jan 09, 2026, 4:53 PM UTC

How do you calibrate?

I mean, the sensitivity of the microphones varies a lot.

Legal proof needs a metrological chain of trust.

Re: Show HN: Free noise evidence generator for tenant complaints

#10

Post by A_Duck » Fri, Jan 09, 2026, 4:54 PM UTC

Congratulations on building a nice-looking app that addresses a legitimate need.

I'd like to see some proof that this is able to accurately measure noise level across a range of devices. The CDC have a sound meter app [1] which has been tested to 2db accuracy, and they only make that available on specific Apple devices because calculating noise level depends on the hardware.

I'm sorry to ask, but I'm seeing many cases of AI apps making accuracy claims based on the author’s ‘reasonableness spot checks’ but with no statistical testing that the outputs are accurate.

[1] https://www.cdc.gov/niosh/noise/about/app.html