A cylindrical horn is a type of acoustic device that produces sound by vibrating air within a cylindrical shape. It is commonly used in musical instruments, such as trumpets and trombones, to amplify sound. The design allows for a focused projection of sound waves, enhancing the instrument's volume and tone quality. The cylindrical horn operates on the principle of resonance, where specific frequencies are amplified due to the shape of the cylinder. This design can also be found in various applications, including loudspeakers and megaphones, where clear sound transmission is essential for communication and performance.