The aim of the research described in this paper was to ascertain whether or not there are differences in intelligibility between male and female voices under noise conditions which are spectrally in agreement with everyday speech maskers. An experiment was carried out in which the CVC and phoneme intelligibility of ten male and female voices was measured. The listeners also gave their opinion on a number of scales per speaker, including intelligibility. The results of the CVC intelligibility test indicate that no differences exist between male and female speakers as a group, whereas clear differences are found within the groups. The results of the subjectively scored intelligibility correlate fairly well with the results of the CVC intelligibility test.