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.
Oil has helped make many fond childhood memories of drawing inside a classroom or a home. Each and every crayon in a child's Crayola box consists of paraffin wax, a waxy solid made from petroleum. Paraffin wax also happens to help make candles, and may even provide the polish on an apple or the glossiness of chocolate.