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Table 1 Description of the 54 available noise-related degradation conditions.

From: Performance Study of Objective Speech Quality Measurement for Modern Wireless-VoIP Communications

Conditions Tandem Codec-PLC Noise Type SNR (dB) Loss Type Loss Rate (%)
1–48 None G.711, G., G.729, AMR hoth 10,20 random, bursty 2
    car 10 random, bursty 2
    babble 10 random, bursty 2
    hoth 10,20 bursty 4
    car 10 bursty 4
    babble 10 bursty 4
49–54 Asynchronous G.729 G.729, AMR AMR car 10 random, bursty 2
    car 10 bursty 4