Normal noise is okay but if it is louder than normal then put soft cotton balls in baby's ear. 

I did it but still I am worried

thank you all

Hey Sonali,  it's better to keep cotton in your little one 's ears.

Very loud noises are not good for baby's <u>tender</u> eardrums. Keep cotton in baby's ears. And if the noise is disturbing baby's sleep, then play White Noise on phone. Easily available as White noise apps or on YouTube.