Masking those extraneous noises with sleep headphones seemed like a no-brainer. This led me to try the more expensive Manta Sound Sleep Mask, which costs $143. In addition to supposedly being ...
One user wrote that nobody warns you about the noises that some babies make in their sleep. "Babies don't sleep like a baby," they added. Another user called the advice "sleep when the baby sleeps" ...
However, a 33 NRR may not be totally necessary for sleep — the measurement is primarily used to gauge ear protection from potentially damaging sounds, such as loud machinery or music.