While you're speaking, your brain doesn't hear your voice the way other people hear it — it's already "auto-corrected" the sound in your head to match what you meant to say. That's why you don't catch your own pronunciation mistakes, even after saying the same sentence dozens of times. Recording and listening back is the only way to break that loop.
When you speak, you hear your own voice partly through bone conduction inside your skull, not just through air the way you hear other people — the sound you perceive in your head genuinely differs from what others actually hear. On top of that, your brain always knows what it intended to say, so it's easy to "hear" the intended sound rather than the sound that actually came out. That's why a single pronunciation mistake can repeat hundreds of times without the speaker ever noticing.
Listening back to your own recording — separated from the moment of speaking — lets you hear exactly what other people hear. It's the simplest possible step, no special equipment needed, but it's also the step most self-learners skip because listening to their own voice feels uncomfortable.
A phone is enough — no special equipment needed. Record whatever you just practiced, or your answer to a sample question.
If you're practicing from a model audio (as in shadowing), listen to the original right before your own recording so the comparison happens while your ear is still "fresh".
Listen for specifics: does the intonation rise and fall the same way, do sentence-final sounds get swallowed, does the pace feel natural — compare point by point, not just a general impression.
Don't try to fix everything at once — pick the 1-2 clearest gaps each time, and drill until the new recording sounds closer to the original.
Record-and-compare is step 4 of the shadowing method — the most important step and the easiest one to skip when practicing alone. Doing this consistently alongside daily practice trains you to catch mistakes yourself instead of waiting for someone else to point them out — and even with a teacher grading you, listening back first speeds up how fast you learn to spot your own errors.
Book a free consult — Hải will help you hear mistakes you genuinely can't catch on your own.