Hearing Issues
When wearing stereo headphones, people with unilateral hearing loss can hear only one channel, hence only half of the components of the music, e.g., bass or piano, but not both (although most modern recordings feature amplitude difference in instruments between the channels, rather than complete silence in one channel and full volume on the other, with respect to one specific instrument). The need for headsets for cellphones and VOIP communication has made monaural headphones, which often combine stereo to mono sound, readily available to solve the problem. Stereo headphones may also be connected to a sound source with a stereo-to-monaural adapter to achieve a similar effect (the two stereo channels going into one headphone).
Some portable music players, such as the iPhone from Apple, have accessibility features which will allow you to change the sound to mono.
Read more about this topic: Unilateral Hearing Loss
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