Warren, Bashford, Healy, and Brubaker (1994) reported increases in the apparent duration of the fainter sound (the inducee), which alternated with a sound of higher intensity (the inducer). The inducer was a 70 dB, 1 kHz sine tone, and the inducee was a 66 dB sine tone, varying between nine frequency values, one value also 1 kHz, and the other eight frequencies were 1, 2, 6, and 10 semitones (STs) higher or lower. Both the inducer and the inducee lasted 200 ms.
2008, Gert ten Hoopen, Ryota Miyauchi, Yoshitaka Nakajima, “Time-Based Illusions in the Auditory Mode”, in Simon Grondin, editor, Psychology of Time, Bingley, W.Y.: Emerald Group Publishing Limited, page 174