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At least 19 recordsLinked to original sources
PubMedDate not supplied

Human speech development for an implantable artificial larynx.

An electromagnetic artificial larynx was implanted in two volunteer laryngectomees. Both patients were able to communicate well, but the voice quality still needed improving. Therefore, in this investigation, listener judgments were obtained of 22 different sound sources with a view to incorporating the preferred speech sound in a new version of the device. Electroglottograms were used as sound sources in a speech synthesizer and sentences were produced with different voice qualities for judgmental tests. The results of the listening tests showed a distinct preference for waveforms corresponding to a long completely open phase, a very brief completely closed phase, and an abrupt closing gesture. The optimum acoustic characteristics for the device will be used by electrical engineers to manufacture a new version of the artificial larynx with an improved voice quality.

Electrodiagnosis↗
PubMed1981

Individual speaker influence on relative intelligibility of esophageal speech and artificial larynx speech.

Comparisons were made of the relative intelligibility of esophageal and artificial larynx speech. Care was taken to minimize the variable effects of individual speaker characteristics. For example, rather than relying solely on data comparisons between groups of different speakers, contrasts were also made between samples from subjects who could use both means of alaryngeal speech. Fifteen proficient male laryngectomized speakers were selected. Five used only esophageal speech, five used only artificial larynx speech, and five produced both forms of speech. Recordings were made while the subjects read 50 PB (Phonetically Balanced) words embedded in a carrier phrase and were transcribed by 30 naive listeners. Differences in intelligibility between esophageal and artificial larynx speech resulted when data comparisons were based on different speaker groups. However, differences were not evident when data from the same speakers were compared. The results were interpreted to highlight the possible influence of individual speaker characteristics, rather than differences between communication methods.

Humans↗
PubMed2005

[Clinical research of artificial larynx].

OBJECTIVE: Using delayed degradation bone matrix gelatin (BMG) to repair the defect of laryngeal frame for the goal of laryngeal external form and function recovery. METHOD: Partial laryngectomy and total laryngectomy were performed in nine cases with laryngeal cancer, then delayed degradation BMG be implanted in the defect of laryngeal frame or inside sterno hyoid muscle to build the laryngeal external form. In the same time the delayed degradation BMG be implanted in the crico-arytenoid muscle and around fibre with nerve ending, then embedding and sewing up to recover the swallow function and to prevent deglutition disorder. RESULT: The delayed degradation BMG were applied in nine cases to rebuild new larynx, five of them were performed vertical partial laryngectomy and two total laryngectomy. The effect is satisfied after 15 years followed up. Eight of them rebuild the laryngeal external form and function, one patient need put on tube for long-term and cramming to speaking. CONCLUSION: Applying delayed degradation BMG to repair the laryngeal defect not only rebuild the laryngeal external form, but also recover the laryngeal function. It is an ideal bioactivity material and best choice for the new larynx rebuilding in the operation now.

Adult↗
PubMed1994

A pneumatic artificial larynx popularized in Hong Kong.

The 'Taiwan tube' is an inexpensive pneumatic artificial larynx made in Taiwan. The device, which is a tracheo-oral shunt containing a resonator, is popular with laryngectomees in Hong Kong. This paper reports its use and describes its working dynamics which compare favourably with those of other forms of voice restoration.

Adult↗