What are Infrared Headphones?
Infrared (IR) headphones can be used for listening to music or television cordlessly. The headphones utilize a transmitter that connects with audio cables to the audio source, such as a home entertainment center. The transmitter utilizes light-emitting diodes (LEDs) to direct a focused beam of pulsating, invisible light towards a receiver built into the headphone set. The pulsations act as on/off signals that are translated digitally by the receiver into audible sound waves. Most infrared headphones have an effective range of about 30 feet (~10 meters) or less, and require a clear line of sight between transmitter and receiver. Infrared light waves are longer than visible light waves but shorter than radio waves. The longest light waves visible to the human eye are at the red end of the light spectrum. The Latin word, infra means “below” making infrared literally mean “below red.” Within the infrared spectrum there are many frequency bands utilized for different purposes from thermal i
