In practice, 听到 and 听见 can often be used interchangeably without causing confusion, but the subtle difference lies in whether you are focusing on the act of hearing (听见) or the result/outcome of the hearing (听到).
(verb) listen; hear
(verb) heed; obey; listen to
(verb) see; catch sight of
(verb) meet; call on
(noun) view; opinion
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