In communication technology, there are two different types of signals – analog signals which were used earlier, and the latest and the most popular system which is based on digital signals. Analog signals, like music or human speech, vary continuously in frequency and amplitude or in both and pick up other ambient signals called noise. Analog signals deteriorate over distances at higher speeds. Digital signals are either 0 or 1 and they pick up much less noise and the amplifier easily eliminates them as their strength is low. Digital signals can carry more information and they travel long distances suffering less deterioration.

It is on this concept that digital wireless headphones work. They all have certain common features. They all have high-quality sound reproduction, have good portability and sound cancellation features. The quality and sophistication in sound reproduction and other features on board distinguish them from other regular headphones. Some digital wireless headphones also have good cancellation technology, great comfort, and fantastic digital sound. At the heart of this outstanding sound system is a specially designed chip that makes the sound dynamic. Features like volume control, pause, and voice communication are all at the touch of a very responsive control system.

Another genre of headphone is the in-the-ear headphones. Some of the best wireless in-ear headphones have great and solid sound quality, many have app-based useful features with approximately 5 hrs of battery life. Three sets of silicone tips with an ergonomic design ensure a perfect seal in the ear, excellent passive noise isolation and the music is of a high quality with clear punchy bass and an agile treble range. A charging case provides two full charges. The loaded apps facilitate adjusting volume, equalization, and connect Siri or Google assistant depending on the OS. The user can tell the headphone to pause or play when the headphone is being removed. It allows hearing announcements on the train or the irate driver sitting ahead. There are reasonable products in the market to suit various pockets.

There are wireless TV headphones which are available to listen to music as well as other programs on TV. The best ones in this group come with an RF transmitter and two pairs of headphones in a case, have good sound quality, have two separate RCA inputs and allows the user the freedom to roam about the room and it also runs on AAA batteries.