Question

The speed of sound in air varies with the temperature and humidity of the air. In dry air at 20 degrees Celsius, the speed of sound is approximately 343 m/sec. A closed tube resonates with a node at each end for a sound wave in air. What is the length of tube you would choose if you were trying to have a 256 Hz wave resonate in the tube? Would the tube allow a128 Hz wave to resonate? Would the tube allow a 512 Hz wave to resonate?