Spectral Density

Spectral density is a way to analyze signals or data by showing how their energy or power distributes across different frequencies. Think of it as a spectrum that reveals which frequencies carry the most information or strength within a signal, similar to how a prism splits light into various colors. It helps us understand the dominant rhythms or patterns in data—like identifying whether a heartbeat, music, or climate data has more activity at certain speeds. Spectral density is essential in fields like telecommunications, audio processing, and physics, providing insight into the underlying structure of complex signals.