Assessment of Three Modes of Alaryngeal Speech with a Synthetic Sentence Identification (SSI) Task in Varying Message-to-Competition Ratios

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Abstract
The intelligibility measures and listener preference rankings of pulmonary esophageal speech following tracheo-esophageal puneture (TEP) surgery were assessed relative to traditional esophageal speech, artificial laryngeal speech, and normal laryngeal speech. Intelligibility rankings were obtained with sentence length stimuli in the presence of a background competing message at varying message-to-competition ratios. Results for 20 normal-hearing adult subjects showed that although pulmonary esophageal speech was the most preferred of the alaryngeal speech modes, it was the least intelligible in the two most difficult listening conditions (-5-dB and -10-dB message-to-competition ratios).