The basic translation of "the more I listened, the happier I became" would be : 聞けば聞くほど、私は幸せになった。 I think there are various translations for the construction of "the more ..., the -er ... " depends on the situations. I hope this was helpful.

The translation would be: 私はもと聞くともと幸せになりました。 See you. Hugs from Brasil!

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中文翻译： 听得越多越快乐