How does a reed work in an organ pipe?

A reed in an organ pipe functions as a sound-producing element by vibrating in response to airflow. When air is blown through a narrow opening, it causes the reed to oscillate, creating pressure variations that generate sound waves. The pitch of the sound is determined by the size and material of the reed, as well as the dimensions of the pipe. This mechanism allows for a rich variety of tones in reed instruments, such as harmoniums and certain types of organs.