Acoustic devices are tools designed to manipulate sound waves for various applications. They can include items like microphones, speakers, and sonar systems. These devices work by converting sound energy into electrical signals or vice versa, allowing for sound recording, amplification, and detection. In addition to everyday uses, acoustic devices play a crucial role in fields such as music, communication, and navigation. For example, ultrasonic sensors are used in medical imaging to create images of internal body structures, while acoustic panels help improve sound quality in recording studios and theaters.