# HD Voice
> Wideband audio technology delivering clearer, more natural-sounding voice calls

HD Voice uses wideband audio codecs to deliver richer, clearer voice calls over VoIP.

## What is HD Voice?
HD Voice (also called wideband audio) refers to voice calls that use a wider frequency range (50 Hz – 7 kHz or higher) compared to traditional narrowband telephony (300 Hz – 3.4 kHz). The result is significantly clearer, more natural-sounding speech.

## Codecs behind HD Voice
HD Voice is enabled by wideband [codecs](/voip-glossary/codec/) such as G.722, AMR-WB, and Opus. These codecs capture more of the speaker's voice, reducing listener fatigue and improving comprehension — especially in noisy environments.

## HD Voice in softphones
Most modern [softphone](/voip-glossary/softphone/) clients support HD Voice natively. When both ends of a call use a wideband codec and sufficient [QoS](/voip-glossary/qos/) is maintained, the audio quality rivals in-person conversation.

## Related Terms
- [Codec](/voip-glossary/codec/)
- [MOS](/voip-glossary/mos/)