You may be interested in Minimal Pair Testing [0]. The idea is to train you ear to decipher between similar sounds (for example if you wanted to recognize "lock

You may be interested in Minimal Pair Testing [0]. The idea is to train you ear to decipher between similar sounds (for example if you wanted to recognize "lock" vs "rock"). I first encountered the idea in Fluent Forever by Gabriel Wyner. [0]https://en.wikipedia.org/wiki/Minimal_pair https://en.wikipedia.org/wiki/Minimal_pair