time domain

When considering data that has a time series, such as sound level or weather patterns, we can represent it using its value at successive time points (val(t=0), val(t=1), ...). This is called a time domain representation, and is both the simplest representation and also the form in which most data is initially gathered. However, the time series can be represented in other ways, notably frequency domain that treats the data as a sum of sine waves or similar functions.