This site uses sounds from Freesound : follow each sounds links for more information and read the freesound FAQ for details on licenses.
It mixes 6 differents samples. if you intend to use the mix please credit Freesound users according to licenses.
The first spectrograph is the one of the mix, followed by the 6 individuals spectrographs.
Made using freesound.js the javascript client for Freesound API.