Signal processing is a field of study within electrical engineering that focuses on analyzing, synthesizing, and modifying signals. Signals can represent various types of data, such as audio, video, images, and sensor data. Signal processing techniques are used to extract useful information from signals, reduce noise or interference, and enhance the overall quality of the signal. This field is fundamental in a wide range of applications, including telecommunications, audio and video processing, biomedical imaging, radar and sonar systems, and many others. Techniques used in signal processing include filtering, modulation, spectral analysis, and compression.