Mosquito wingbeat check
Listen through your phone's microphone, or load a recording. It looks for the steady 280–950 Hz whine of mosquito wings, with the harmonics that set it apart from other sounds.
Analyzing the sample…
Two fly-bys, a voice and a couple of knocks, generated in your browser.
Tap Listen live and put the phone by your pillow, microphone end up. Mosquitoes come to your head to bite, so that's where it will hear them. When it does, the screen turns amber and the alarm beeps (at most every 15 s). Night screen dims everything while it waits. Keep the phone unlocked; locking it stops listening. Audio never leaves this device.
Reference bands come from real phone recordings in Stanford's Abuzz dataset, measured with this detector: common house mosquitoes (Culex pipiens) at 380–560 Hz and tiger mosquito females (Aedes albopictus) at 590–615 Hz. Wingbeat pitch rises with temperature and varies between individuals, so treat a match as a hint, not an ID.
Each 32 ms slice is compared with the recording's own quiet background, so fans and electrical hum drop out. In what's left, it looks for a tone between 280 and 950 Hz whose harmonics stand well clear of the gaps between them, and only counts it if the pitch holds for about a third of a second. Long range averages over almost a second, which picks up a buzz about half as loud (roughly twice the distance) but reacts a bit slower.
Music, singing and high-pitched voices can look the same. A buzz that never stops for the whole recording can blend into the background. Tested on 14 Abuzz phone recordings of mosquitoes (all detected) and one background-only recording (nothing found).
Runs entirely in your browser. Recordings longer than 5 minutes are trimmed to the first 5.
Listening
No mosquito heard