Noise types can be categorized into several main categories, including white noise, pink noise, and brown noise. White noise contains all audible frequencies at equal intensity, creating a consistent sound that can mask other noises. Pink noise has equal energy per octave, resulting in a deeper sound that is often perceived as more soothing. Brown noise emphasizes lower frequencies, producing a rumbling sound similar to thunder. Another classification includes environmental noise, which arises from natural or human-made sources, and signal noise, which interferes with communication signals. Environmental noise can include sounds like traffic or wind, while signal noise may occur in electronic devices, affecting clarity and quality. Understanding these types helps in various fields, including acoustics and audio engineering.