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.
To dream of noticing oil represents the need to conduct things in a far better fashion. This may also suggest a need to be more loving and compassionate in your life. To see some baby oil in your dream stands for the occasional yearning to comfort and pacify the child within. On the other hand, to see crude oil in your dream symbolizes grand riches and treasures. This may also be treated as a reminder of your need for increased social activities.