“…In contrast, understanding of speech presented in interference deteriorates steadily and sometimes dramatically. For example, understanding of speech with added speech-spectrum random noise or multi-talker babble deteriorates with age, especially from the seventh decade on (Gelfand, Piper & Silman, 1986, Dubno, Lee, Matthews & Mills, 1997; reverberation increasingly affects speech understanding as listeners age (Duquesnoy & Plomp, 1980, Nabelek & Robinson, 1982; thresholds for word, consonant, and even vowel identification increase with age (van Rooij & Plomp, 1990); and age predicts understanding of speech in the presence of reverberation (Humes & Christopherson, 1991, Divenyi & Haupt, 1997a or an interfering ipsilateral or contralateral sentence (Jerger & Hayes, 1977, Divenyi & Haupt, 1997a. Speech understanding by older listeners is also affected by time compression (Konkle, Beasley & Bess, 1977, Tun, 1998, periodic interruption (Bergman et al, 1976), and low-pass filtering (Cheesman, Hepburn, Armitage & Marshall, 1995)-especially when the filtering is paired with reverberation (Humes & Christopherson, 1991).…”