Bandwidth describes the range of audio frequencies a headset can receive. The higher the bandwidth, the better the audio quality. Wideband is the sound quality used in most high-definition business and mobile voice network headsets. Narrowband, on the other hand, is the standard audio quality found in traditional voice networks.
Noise cancellation prevents those unwanted sounds that ruin your listening experience. Active noise cancellation is the most common method. It uses power to generate opposite sound waves that effectively “cancel” unwanted sounds. The less common passive noise cancellation uses insulating materials or other technologies to block unwanted sounds, without the aid of power. Because the term “noise cancellation” is frequently used to describe active noise cancellation, some manufacturers have chosen to call passive noise cancellation “sound isolation.” Headsets with passive noise cancellation, or sound isolation, generally cost less and allow you to hear your own voice better while speaking.
Keep in mind, your hearing can be damaged by certain sound waves. So, you’ll also want to look for a headset with built-in hearing protection that prevents exposure to sounds above 118 dB.