The Hum

The hum is a low-frequency noise that some people can hear, while others cannot. Think about the sound you hear when a big truck drives by your house, it's like that but more constant and less loud. This noise is usually heard indoors and can be very annoying to those who can hear it. The hum is still a mystery, and no one knows for sure what causes it. This sound can be caused by many things like electrical devices, traffic, or even the wind blowing over buildings. But, no matter what causes it, we know that it exists, and that some people have to deal with it every day.