“Also, it’s important for parents to be mindful of external noise starting at this time which can wake babies, for example: birds tweeting, traffic picking up on the roads and parents getting up for work,” she says. “This is where white noise, which plays all night, can be very helpful for blocking out that external noise.”
Article source: https://www.huffingtonpost.co.uk/entry/baby-toddler-waking-up-too-early_uk_63a2e8bae4b0e2fa1a49cfb3