| Spanish | English |
| MOS de calidad de conversación | conversational quality MOS (A class of MOS values that takes into account listening quality in each direction, as well as bidirectional effects, such as delay and echo) |
| MOS de calidad de escucha | listening quality MOS (Within the VoIP industry, a commonly used class of MOS values that measures the quality of audio for listening purposes only, without taking into account any bidirectional effects, such as delay and echo) |
| MOS de envío | Sending MOS (A prediction of the wideband listening quality MOS (MOS-LQ) of the audio stream that is being sent from the user. This value takes into account the speech and noise levels of the user along with any distortions) |
| MOS de escucha | Listening MOS (A prediction of the wideband listening quality MOS (MOS-LQ) of the audio stream that is played to the user. This value takes into account the audio fidelity and distortion and speech and noise levels) |
| MOS de red | Network MOS (A prediction of the wideband listening quality MOS (MOS-LQ) of audio that is played to the user. This value takes into account only network factors such as codec used, packet loss, packet reorder, packet errors and jitter) |
| puntuación MOS de la conversación | Conversational MOS (A prediction of the narrowband conversational quality MOS (MOS-CQ) of the audio stream that is played to the user. This value takes into account the listening quality of the audio played and sent across the network, the speech and noise levels for both audio streams, and echoes) |
