The main goal of this study was to investigate the efficacy of four vibrotactile speechreading supplements. Three supplements provided single‐channel encodings of fundamental frequency (F0). Two encodings involved scaling and shifting glottal pulses to pulse rate ranges suited to tactual sensing capabilities; the third transformedF0 to differential amplitude of two fixed‐frequency sinewaves. The fourth supplement added to one of theF0 encodings a second vibrator indicating high‐frequency speech energy. A second goal was to develop improved methods for experimental control. Therefore, a sentence corpus was recorded on videodisc using two talkers whose speech was captured by video, microphone, and electroglottograph. Other experimental control issues included use of visual‐alone control subjects, a multiple‐baseline, single‐subject design replicated for each of 15 normal‐hearing subjects, sentence and syllable pre‐ and post‐tests balanced for difficulty, and a speechreading screening test for subject selection. Across 17 h of treatment and 5 h of visual‐alone baseline testing, each subject performed open‐set sentence identification. Covariance analyses showed that the single‐channel supplements provided a small but significant benefit, whereas the two‐channel supplement was not effective. All subjects improved in visual‐alone speechreading and maintained individual differences across the experiment. Vibrotactile benefit did not depend on speechreading ability.