MeanOpinionScore(MOS)isawidelyusedmetricintelecommunicationsandaudioqualityassessment.Itquantifiestheperceivedqualityofvoiceoraudiosignalsasexperiencedbyhumanlisteners.Thescoretypicallyrangesfrom1(poorquality)to5(excellentquality),basedonsubjectiveevaluationsfromagroupoftestparticipants.MOSiscommonlyappliedinevaluatingspeechcodecs,VoIPsystems,andotheraudiotransmissiontechnologies.Thetestingprocessinvolvesparticipantslisteningtoaudiosamplesandratingtheirqualityundercontrolledconditions.Whilesubjective,MOSprovidesvaluableinsightsintoreal-worlduserexperiencesandhelpsengineersoptimizesystemsforbetterperceivedperformance.StandardizedmethodslikeITU-TP.800defineproceduresforconductingMOSteststoensureconsistencyandreliability.
