Real-time analyzer apps, which give the frequency breakdown of ambient noise. https://en.wikipedia.org/wiki/Real-time_analyzer https://en.wikipedia.org/wiki/Re

Real-time analyzer apps, which give the frequency breakdown of ambient noise. https://en.wikipedia.org/wiki/Real-time_analyzer https://en.wikipedia.org/wiki/Real-time_analyzer Previous thread about the use of these for debugging mystery sounds that not everyone can hear: https://news.ycombinator.com/item?id=14981088 https://news.ycombinator.com/item?id=14981088