Speech and Language Therapy Information!

Your trusted source for best quality information about speech, language and communication needs. 

Comprehensive information on all aspects of human communication and speech therapy, including speech, language, voice, stuttering and much more.....

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Speech development, speech disorders, phonetics, phonology, articulation, speech perception...and much more!


Language development, acquisition, verbal language, syntxx, morphology, pragmatics...and more!


The communication chain, conversation, body language, communication disorders...etc...etc


Voice development, voice disorders, voice care for adults and children, how to improve vocal habits, voice assessment and measurement...and so much more!


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Easy Reading

Easy to read human speech, language and communication needs articles written in Plain English. Includes free printable PDF files for use by clinicians, parents, carers, teachers...etc.

A selection of our articles...

Schwa Lowering

allophones 101 Schwa Lowering header

We have seen elsewhere (Central Vowels) that one of the two central vowels of English frequently appears in unstressed syllables. This is the schwa vowel /ə/. We have also noted that this phoneme occupies a mid position, being articulated with the mouth open halfway between close-mid and open-mid (see Figures 9 and 10, Central Vowels). Now, […]

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Brain Facts

brain facts header

Brain areas and brain functions ‘A baby is born with over 100 billion brain cells. At birth only 25% of the brain is developed. By age three 90% of the brain is developed.’ (Catherwood, 2000) The diagram of the brain (below) reveals some key ideas about its various areas and functions. NB: To view this […]

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Acoustic Measures (Norms)

acoustic measures header

Question: 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 […]

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Featured Articles


Human Communication 101 is a series of introductory texts providing high quality information on selected aspects of human communication, with particular emphasis on speech, language and communication needs.

The Causes of Stuttering

The causes of stuttering are unknown but neurological development, parental reaction, trauma and a predisposition to stuttering have all been suggested.