I made this recording last year of the annual return to nest of Great Tits (Parus major) to their nest above my front door. The tiny chicks have their parents dancing in non-stop attendance for two weeks or so as the chicks are insatiable.
Last year I was ready to make a recording of the chicks in full song, just days before they took to the wing - which I missed every year and assume to be early in the morning.
Playing this recording really makes the point that energy in what hi-fi listeners attribute to the tweeter band can be extremely fatiguing if not perfectly blended with that of the upper band of the bass/midrange driver. So here is what a clutch (perhaps four or five) of tiny tweeters sound like with accompanying spectral analysis.
>>> Video talk-through here <<<