netbeep by Robert Gerlach

Plays a sound on each network request. Listen to your website and hear how it performs. Different sounds for different request types (same-origin, cross-origin, tracking, malware). The bigger the file, the higher the pitch.

Demo: https://www.youtube.com/watch?v=NvHHbEnA8Tg

GitHub: https://github.com/combatwombat/netbeep