Assistive Tool Design for Speech Production Disorders

Ifukube, Tohru

doi:10.1007/978-3-319-47997-2_6

Cited by 3 publications

(2 citation statements)

References 8 publications

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“…The recent work on electrolarynxes suggests a variation of fundamental frequencies to produce different tones for tonal languages (Guo et al, 2016;Ifukube, 2017;Wang et al, 2017a;Wang et al, 2017b). However, extensive training is required to produce pitch variations.…”

Section: Introductionmentioning

confidence: 99%

Design of Electrolarynx to Increase Energy Efficiency by Varying the Driving Source

Maila

Bhat

Prasad

2020

IJTech

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The larynx is an organ in the human respiratory system that forms the basis of the speech production system. An electrolarynx is a device used by most laryngectomees to regain their verbal communication. Our objective was to design an electrolarynx with increased energy efficiency by modifying the driving source. Initially, we designed the electrolarynx to accommodate various driving signals. We then compared the voice output obtained by different input signals for quality and measured energy consumption using a digital multimeter. When compared to existing methods, the proposed driving source was found to be 11.1% more energy efficient. Voice quality was also better than the traditional driving source by 31.6%.

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Section: Introductionmentioning

confidence: 99%

Design of Electrolarynx to Increase Energy Efficiency by Varying the Driving Source

Maila

Bhat

Prasad

2020

IJTech

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“…The efficiency of these algorithms tends to decrease when the estimation of noise reference signal becomes complex resulting in poor noise reduction [25]. The latest work on the device suggests the fundamental frequency variations to produce different tones for tonal languages [26][27][28][29]. However it requires an extensive training to produce variations in pitch.…”

Section: Introductionmentioning

confidence: 99%

A Design of Low Power Electrolarynx with Glottal Modified Source

Madhushankara¹,

Bhat²,

Prasad³

2018

JESTR

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The larynx is a flexible part in the respiratory tract, a source of vibration during verbal communications. An electrolarynx or artificial larynx is a common device adopted by the laryngectomee to restore the speech. The objective of this paper is to design a low power electrolarynx using modified glottal source and perform an objective and subjective analysis of the vowel quality. In the first part, an electrolarynx circuit is designed which can drive different types of input signals. In the second part, a driving source is designed by pre-filtering the effect of neck surface. The power consumption of the prototype is measured and compared with the conventional type of electrolarynx. The vowel qualities are compared with that of normal vowels produced by a volunteer. We have found out that the glottal modified wave can reduce the power supply requirement of the electrolarynx. Loudness, quality factor and position of the formants are used as measures of quality for vowels produced by the present approach and found to be better (or comparable) than the traditional electrolarynx. When compared to existing method, the electrolarynx with glottal modified wave is power efficient and has a potential in forming a wearable device. It also has better vowel quality than the one with the conventional driving signal.

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