Hello Charoncita,
The following provides the necessary steps for transferring your Voice Memos to your computer.
Sync voice memos with iTunes. Connect iPhone to your computer, then in iTunes select iPhone. Select Music at the top of the screen (between Apps and Movies), select Sync Music, select “Include voice memos,” and click Apply.
Voice memos synced from iPhone to your computer appear in the Music list and in the Voice Memos playlist in iTunes. Voice memos synced from your computer appear in the Voice Memos app on iPhone, but not in the Music app.
iPhone User Guide - Move recordings to your computer
http://help.apple.com/iphone/7/
Cheers,
Allen