Speech Therapy: Information and Resources Your trusted source for speech therapy information! Comprehensive advice on human communication, speech, language, voice and stuttering. http://www.speech-therapy-information-and-resources.com/ Sat, 31 Oct 2009 18:14:02 +0000 Joomla! 1.5 - Open Source Content Management en-gb Speech Language and Communication Information http://www.speech-therapy-information-and-resources.com/speech-language-and-communication-information.html http://www.speech-therapy-information-and-resources.com/speech-language-and-communication-information.html

Your Trusted Source for Speech Therapy Information!

  Best quality information about speech, language and communication needs.

Here you'll find comprehensive information on all aspects of human communication and speech therapy, including speech, language, voice, stuttering and anatomy. Whether you’re concerned about your personal or professional development – or just fascinated by the subject – you'll find information relevant to both children and adults with communication difficulties.

There’s information on speech therapy jobs, speech therapy education…and much more…



October 2009 - Focus on Voice

Breathing Out thumbnail  

At its simplest, voice is defined as the sound produced in the larynx by the vibration of the two vocal cords. For example, if a speech sound is produced with the vocal cords vibrating this sound is said to be voiced. If a speech sound is produced without vibration of the vocal cords then the sound is said to be voiceless.

But this is only the start. We've got lots of information for you on many aspects of the human voice, including...

graham@grahamwilliamson.com (Administrator) frontpage Tue, 27 Jan 2009 12:58:15 +0000
Voice Disorders http://www.speech-therapy-information-and-resources.com/voice-disorders.html http://www.speech-therapy-information-and-resources.com/voice-disorders.html

Voice disorders

ABSTRACT: Voice disorders are classified as organic, psychogenic or functional. Structural, psychological or physiological impairments affect acoustic features of the voice. Affected features include: pitch, loudness, resonance, quality and flexibility. These impairments lead to aphonia or dysphonia. This article provides examples of common voice disorders.

graham@grahamwilliamson.com (Administrator) frontpage Thu, 13 Nov 2008 15:00:07 +0000
Vocal Nodules http://www.speech-therapy-information-and-resources.com/vocal-nodules.html http://www.speech-therapy-information-and-resources.com/vocal-nodules.html

Vocal nodules

ABSTRACT: Vocal nodules are non-malignant calluses on the vocal cords. They may be large or small, soft or hard. They are caused by trauma to the vocal cords because of vocal misuse and abuse. The voice sounds rough with associated breathiness. Pitch and pitch range is restricted. Voice therapy is the preferred treatment option. However, hard (fibrosed) vocal nodules will first require surgical removal followed by voice therapy to eliminate abusive vocal behaviours that might lead to a recurrence.

graham@grahamwilliamson.com (Administrator) frontpage Mon, 15 Dec 2008 13:41:53 +0000
S/Z Ratio http://www.speech-therapy-information-and-resources.com/sz-ratio.html http://www.speech-therapy-information-and-resources.com/sz-ratio.html

S/Z Ratio

ABSTRACT: The S/Z Ratio is an indicator of voice disorder. It measures the ability to sustain the voiceless sound ‘s’ in comparison to sustaining the voiced sound ‘z’. 95% of people who have some difficulty affecting the movement of their vocal cords have an S/Z ratio of greater than 1.40. This article demonstrates how to calculate an S/Z Ratio and how to interpret the result. 

graham@grahamwilliamson.com (Administrator) frontpage Mon, 24 Nov 2008 15:09:16 +0000
Acoustic Measures: Norms http://www.speech-therapy-information-and-resources.com/acoustic-measures-norms.html http://www.speech-therapy-information-and-resources.com/acoustic-measures-norms.html

Acoustic Measures: norms


I am really impressed with your site, but was wondering if you had any good references to obtain normative comparison for things such as jitter, shimmer, noise to harmonic ratio, and fundamental frequency.

My Reply:

It is difficult to be precise about norms for acoustic measures such as jitter, shimmer, noise-to-harmonics ratio and fundamental frequency. There are many factors which militate against declaring all-encompassing norms. Some of these are person-specific (e.g. gender and age differences), cultural (e.g. what north Americans may consider to be within normal limits may be different from what north Koreans consider to be typical), and related to the testing environment (e.g. variation in the equipment used, and – importantly – the use of different algorithms in the software programs which are used to make the measurements).

graham@grahamwilliamson.com (Administrator) frontpage Mon, 05 Oct 2009 14:55:35 +0000