Acoustic signals refer to sound waves produced by an object or organism that can be detected by a receiver or listener. This research area involves studying the properties of sound waves, their production and transmission, as well as their reception and interpretation by organisms. Acoustic signals play a crucial role in communication among animals, such as birds, whales and insects, as well as in various human activities, such as sonar systems, speech recognition, and music processing. Researchers in this field investigate how acoustic signals are generated, how they are modified by the environment, and how they are perceived and processed by different organisms. This research area can have applications in fields such as bioacoustics, linguistics, environmental monitoring, and engineering.