Just to clarfiy matters and side with sam2 and oomins1105- the gemara speaks about “kol be’isha ervah’ without specifying what “kol’ means but in the shulchan aruch it says ; ” jesh lezoher mishmyas kol ZEMER isha be-shaas kerias shemah””. It is clear that the shulchan aruch spoke about song (zemer) and not just talking. Additionally, the original prohibition dealt with hearing the “kol isha’ during “Krias shema” but later acharonim have expanded it to include any song, even not at krias shema.
See also be’er heitav on siman 75 (3)