It is very important to distinguish between voiced and unvoiced sounds in English due to two reasons:
To be aware of the difference
To be understood
All vowels and diphthongs are voiced.
Unvoiced sounds are easier to pronounce because they are made with breath only:
[s] soup, [p] pick, [t] tick, [k] kick, [tʃ] church., [ʃ] shoe, [f] fan, [θ] think.
When pronouncing voiced sounds extra effort is required because they are made with vibrations of vocal cords: [z] zoo, [b] bubble, [d] dog, [g] giggle, [dʒ] George, [ʒ] rouge, [v] van, [ð] that, [l] lock, [m] meter, [n] nun, [ŋ] king.
Because an extra effort is required, many students substitute voiced consonants with their unvoiced partners, particularly at the end of the word. Moreover, in some languages, for example, German and Russian it is not a pronunciation mistake to substitute a voiced consonant with its unvoiced partner: “dog” may sound like “dok”, or “bed” like “bet”. In English, as you can see from these examples, the meaning of the word changes if you do not observe voiced consonants.
In English, plurals and past tense are identified by word endings.
Rule: If the sound before the ending is unvoiced, then the ending will be unvoiced too. If the sound before the ending is voiced, then the ending will be voiced.:
Plurals: cats /s/, kicks /s/, dogs /z/, beds /z/
Past tense: kicked /t/, picked /t/, begged /d/, dragged /d/
It is rather difficult to pronounce consonants at the end of the word in English for some nationalities such as Spanish and Chinese. They tend not to pronounce the ending at all. This creates an impression that they do not know English grammar, namely how to create plurals and past tense. Because of that, their speech may sound uneducated.
We recommend practicing voiced and unvoiced consonants with the apps Get Rid of your Accent UK1 and Fluent English Speech (British English) or American Accent App and Fluent American Speech (American English) and book a couple of elocution lessons.
More on www.batcsglobal.com