If the noise is lower, the AC service may be the cause. Magnetic fields from transformers can cause humming. Mains transformers typically cause an AC magnetic field around them. This magnetic field can be copled to wiring, electronics or signal transformers and cause humming.
Baby oil benefits: ear. Mineral or baby oil is good from treating common ear problems, such as wax build-up. For those that are hard of hearing, we recommend using a few drops of heated baby oil before going to your ear specialist. Then pour the drops in your ear, keeping your head cocked. Hold for a few minutes.
The most popular baby oil is probably Johnson and Johnson's Baby Oil. It's in every drugstore in the baby care products section, and you've probably seen it a million times. The ingredients in baby oil are simply mineral oil and fragrance. Buy Johnson and Johnson Baby Oil on Amazon.com. Mineral oil can be a controversial skin care ingredient, and many people avoid using it which is a shame. There is nothing wrong with using mineral oil on your skin or your baby's skin.