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Middle center vowels: /ʌ/ vs /ə/: Schwa is for Unstressed Vowels

 



Both /ʌ/ and /ə/ share the same coordinating point, the middle center of the mouth. They differ in stress. /ʌ/ is used for a stressed syllable, and /ə/ is used for unstressed syllables.

/ʌ/ words 

Some common words with /ʌ/ include the following:

 with “u”: 

bun, bus, but, butter, cut, fun, gun, luck, lunch, run, summer, sun, Sunday, thunder, truck, tunnel, under, up, us

 with “o”: 

Monday, money, monk, monkey, month, honey, London, onion, son, wonder, wonderful, cover, covet, discover, dove (bird), glove, love,oven, shovel

 with “ou” 

country, couple, cousin, double, southern, touch, trouble, young

 with “oo”: 

blood, flood

 with “ough”: 

rough, enough, tough

/ʌ/ homophones

These are homophones: 

none - nun 

one - won 

some - sum 

son - sun

/æ/, /ʌ/ minimal pairs

ankle uncle 

ban bun 

bank bunk 

batter butter 

cab cub 

cap cup 

cat cut

dam dumb 

drank drunk 

hat hut

lack luck 

paddle puddle 

rag rug 

ran run 

sack suck 

sank sunk 

snag snug 

stack stuck 

track truck 

tramp trump


Schwa for de-emphasis

/ʌ/ and /ə/ are middle center vowels, but their use is entirely different. /ʌ/ is used for a stressed sound, but /ə/, called schwa, is used for an unstressed sound. Schwa is created by the absence of any movement in the mouth. The tongue is relaxed. In other words, schwa is pronounced in the center middle of the mouth, where the pronunciation is the most economical. This explains why schwa is the most common sound in American English. In general, a vowel sound that is unstressed can be called schwa. Naturally, schwa does not have precise articulation. So, schwa can sound different since its actual pronunciation depends on the neighboring sound. For example, in “Rosa’s” vs “roses”, the ‘a’ in ‘Rosa's’ is an unstressed /ʌ/, but the ‘e’ in ‘roses’ is an unstressed /ɪ/. Despite this difference in auditory quality, both are viewed as the /ə/ sound.


How is it possible for a sound that has no clear manner of articulation to be the most common sound in English? To understand the use of schwa, we need to know that English is a stress-timed language, meaning that stressed sounds (or syllables) come in a regular interval. Stressed syllables are pronounced with emphasis. The sounds are loud, high pitched and often long. Also, its vowels have clear articulation. To make this emphasis even more salient, unstressed sounds are deemphasized and reduced. That is, unstressed sounds are spoken quietly, in a low-pitch, and fast. More importantly, the vowels of unstressed sounds generally become schwa. For example, consider the word ‘banana,’ which has a stress in the second syllable. The vowel of the second syllable is clearly articulated with /æ/. But the vowels or the first and the last syllables are reduced to schwa, resulting in the following pronunciation of the word: /bəˈnænə/. 


Since syllables with schwa are pronounced fast and in low-pitch, they can be hard to hear for non-native speakers. In fact, natives use the schwa sound to signal to the listener that the words with schwa are not the main point of the speech. There are two cases that require schwa: unstressed syllables in multisyllabic words, and the normal use of function words (that is, they are not used for emphasis or contrast). 


 Multi-syllabic words

When a word has more than one syllable, not every syllable is given an equal emphasis when spoken. Only one syllable is stressed, and the rest are generally unstressed. The vowel sounds in unstressed syllables are usually reduced to schwa. Schwa allows unstressed syllables to occur more quickly in order to emphasize the sound of the stressed syllables. Schwa can happen with any vowel letters:


the a in about, again, vitamin

the e in synthesis, electric, celebrate

the i in decimal, president, experiment

the o in harmony, occur, condition

the u in medium, umbrella, support

the y in syringe

 

The schwa sound can be found in any position in a word:

in the beginning of a word as in about, ago, amazing

in the middle of a word as in elephant, gallon 

in the end of a word as in idea


Function words

The purpose of schwa is to reduce sound. This allows unstressed syllables to be said quickly so that the main beats of the speech can be placed on the stressed syllables. In speech, function words are usually reduced. Function words are words that indicate grammatical aspects, like tense or mood. Function words include auxiliary verbs, pronouns, articles, conjunctions and prepositions. In normal speech situations, we should reduce function words to keep the stress pattern regular. These are speech segments that require schwa.


a, an, the 

a chair, an apple, the table

am, are, is, was

am i?, how are you?, who is he?, I was singing

and, but

chicken and chips, it’s hard but I like it

than, or

I like it more than you do, coffee or tea

that, to

I told you that he was good, I’d like to see you

can, could

I can do it, I could do it

will, would, should

will it rain?, would you mind?, it should rain

in, on, of

It’s in the closet, it’s on the table, get out of here

for, with

I’m looking for a room, Come with me

have, has, had

I have a question, he has a problem, she had a pet

as, if

As soon as possible, I’ll go if you do



/ər/ words

/ər/ can occur in a stressed and in an unstressed syllable. For example, in butter and father, it is unstressed, but in stir, occur and prefer, /ər/ is stressed:. To distinguish these two cases, some scholars use different symbols: e.g., /ɜr, ɝ/ for the stressed ER sound, and /ər, ɚ/ for the unstressed ER sound. In this book, we use the same symbol /ər/ since their pronunciation is the same.


Another thing to mention regarding /ər/ is that /ər/ is essentially the same sound as the vocalic /r/ (i.e., the /r/ that carries its own vowel sound). This led some to claim that /ər/ is the syllabic consonant /r/ sound. In this book, we treat /ər/ as the composite of /ə/ plus /r/. Some common words containing /ər/ include the following:


 with "er":

certain, concern, determine, her, nerve, perfect, person, service, term, verb, were

 with "ear": 

early, earn, earth, heard, learn, pearl, search

 with "ur": 

burn, curly, fur, hurt, murder, return, surface, surgeon, Thursday, turn, urban, urgent

 with "ir": 

bird, birthday, circle, dirty, firm, girl, shirt, sir, skirt, stir, third, thirsty, thirty

 with "or": 

attorney, word, work, worm, world, worse, worst, worth

 with "our": 

courteous, journalist, journey

 colonel (The word “colonel” also has the r-colored vowel /ər/ as it is pronounced /ˈk/ər/nl/)


/ər/ homophones

These words are homophones: 

birth - berth 

colonel - kernel

earn - urn

fir - fur

heard - herd

tern - turn

/ʌ/, /ər/ minimal pairs 

These are minimal pairs of /ʌ/ and /ər/.

bud, bird

bun, burn 

fussed, first 

shut, shirt 

cub, curb 

ton, turn 

thud, third 

such, search 

tough, turf 

hull, hurl 

gull, girl 

stun, stern 

tum, term 

tuck,Turk 

hut, hurt 

suffer, surfer 

puck, perk 

blood, blurred 

cull, curl 

bust, burst




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