Quiztones is a frequency training tool for musicians, producers and engineers,to develop and refine a more precise listening and frequency recognition skills.
The first quiz lets you test your ability to pick up certain frequencies just by listening to sine waves of varying frequencies.
A tone is played and you have to choose which tone corresponds to the frequency being played.
However there are harder options to chose from like a quiz to identify frequencies from 1/3 octave bands, similar to those of a graphic EQ. This can be great to pick up certain frequencies in a live sound setting.
There is also a quiz that can identify Pink noise frequencies that is altered by dB. This can be potentially great since pink noise is noise that is inhabited by musical frequencies, it can be great to clear up muddy mixes or even accentuate frequencies in a track.
The general tip i used to be able to identify a certain frequency is to memorise one frequency from the subs,lows,mids and highs and compare it to the next one depending on the relative band it lives in.