دستگاه لارینگوگراف

این دستگاه وسیله ای است جهت تشخیص ودرمان ضایعات تارهای صوتی .بااین وسیله می توان فعالیت تاهای صوتی رااندازه گیری وثبت نمود.همچنین به عنوان یک پسنوردبینایی دردرمان اختلالات صوت وناشنوایان قابل استفاده می باشد.این دستگاه شامل یک بخش حساسه می باشد که برروی گردن بیمار (غضروف تیروئید) ازبیرون نصب می گردد.لازم به ذکر است پارازیتها محیطی ،حرکات گردن واجزای آن تاثیری برنتایج ارزیابی ندارد) این حساسه تغییرات ولتاژرادرحین حرکت ولرزش تارهای صوتی دریافت نموده وبه صورت منحنی EGGیاالکتروگلوتوگراف برروی صفحه نمایشگر نشان می دهد. میکروفونی دارد که تغییرات صوت ازطریق دهان رانیزبه همین صورت نمایش می دهدومی توان مقایسه ای ازصوت دهانی وصوت حاصل ازارتعاش تارهای صوتی نیزداشت.جهت کارهای تحقیقاتی ،آموزشی ودرمانی استفاده می شود.ابزارتشخیصی مناسبی به همراه دستگاههای آندوسکوپی وفایبروسکوپی استفاده می شود.

 

Laryngograph's microProcessor Speech Studio is now available in "pocket" format!

The new Digital Laryngograph® and a laptop computer are all that is required to use Speech Studio. Portable and easy to use, this makes objective voice measurement even easier!

• USB powered from laptop Speech Studio provides the world's most powerful and compact voice analysis system for normal and pathological connected speech and sustained vowels;
• clearest Lx/egg output available;
• real-time contact phase display and measurement;
• exceeds the most rigorous safety standards;
• four analogue channels;
• digital image acquisition for quality precision stroboscopy.

Speech Studio is a software and hardware package, which has been specially designed for phoneticians and speech scientists, and for quantitative work by ENT clinicians and SLTs. It supports data recording direct to hard disk, real-time displays, and instantaneous quantitative analysis and pattern target mode for speech training.

Speech Studio software is Windows-based, user friendly, and feature rich. The figure above shows a typical main interface which can be tailored for individual needs.

The number and type of displays can be easily set by simply checking the display name in the Hide/Show group box on the left side of the main frame window.

In the figure on the right, pattern, spech waveforms, nasality and Qx [contact phase] traces are shown.

With Speech Studio, you can not only work on sustained sounds but also on connected speech. When data is recorded, it is always easy to edit and play back. You can select a voiced segment and make jitter and shimmer measurements.

The figure below shows an example of vocal profile analysis results.

Speech Studio performs a comprehensive range of quantitative analyses on connected speech (not just sustained sounds). These operate on all the speech elements captured - fundamental frequency, amplitude, contact quotient, nasality, and frication - both individually and in combination.

One type of graph is a summary of time durations. This figure (right) shows the proportions of time durations for four different speech pattern elements, friction (Fr), voiced sound (Vx), silence (Sx) and nasal sounds (Nx).

Distributions are amongst the other useful graphs supported. The figure (right) shows a first order distribution and a second order distribution of period-by-period fundamental frequencies (Fx). The red trace shows first order distribution, and the black traces shows second order for a pathological voice.

The two pathological voice figures below, show an Fx cross-plot (left) and two superposed connected speech phonetograms (right). The first order is in red and the core second order showing the regular heart of the sample is in black.

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