Introduction to Phonetics

1. What is Phonetics?

Phonetics is the branch of linguistics that studies speech sounds.

It explains:

How sounds are produced
How sounds travel through the air
How sounds are heard and understood
How speech sounds are written using special symbols

Simple example

The words pen, pin, and pan have different sounds. Phonetics helps us study these sounds accurately.

2. What is a Speech Sound?

A speech sound is any sound produced by the human speech organs and used in speaking.

For example:

These are all speech sounds.

3. Branches of Phonetics

Phonetics has three main branches.

A. Articulatory Phonetics

It studies how speech sounds are produced by our speech organs.

For example, it studies:

Where the tongue is placed
How the lips move
Whether the vocal cords vibrate

B. Acoustic Phonetics

It studies the physical properties of sound.

It examines:

Sound waves
Frequency
Pitch
Loudness

In simple words, it studies how sound travels through the air.

C. Auditory Phonetics

It studies how the human ear receives and the brain understands sounds.

In simple words:

Articulatory phonetics = production of sound
Acoustic phonetics = transmission of sound
Auditory phonetics = hearing of sound

4. Speech Organs

The organs used in producing speech are called speech organs or organs of speech.

The main speech organs are:

Lungs
Trachea (windpipe)
Larynx
Vocal cords
Pharynx
Tongue
Teeth
Lips
Alveolar ridge
Hard palate
Soft palate or velum
Nasal cavity
Oral cavity

A. Lungs

The lungs provide the air needed for speech.

Most English sounds are produced when air moves:

Lungs → windpipe → vocal cords → mouth/nose → outside

B. Larynx

The larynx is also called the voice box.

It contains the vocal cords.

C. Vocal Cords

The vocal cords can vibrate or remain still.

Voiced sounds

When the vocal cords vibrate, the sound is called voiced.

Examples:

Voiceless sounds

When the vocal cords do not vibrate, the sound is called voiceless.

Examples:

Easy test

Put your fingers on your throat and say:

zzzz

You will feel vibration. Therefore, /z/ is voiced.

Now say:

ssss

There is little or no vibration. Therefore, /s/ is voiceless.

5. Active and Passive Articulators

An articulator is a speech organ that helps produce a sound.

Active articulators

These move during speech.

Examples:

Lower lip
Tongue
Lower jaw

Passive articulators

These usually remain fixed.

Examples:

Upper lip
Upper teeth
Alveolar ridge
Hard palate

Example

In the sound /p/, the two lips come together.

In the sound /t/, the tip of the tongue touches the alveolar ridge.

6. The Tongue

The tongue is one of the most important speech organs.

Its main parts are:

Tip – the front end
Blade – area behind the tip
Front – front part of the tongue
Back – back part of the tongue
Root – lowest/back part

The tongue changes position to produce different sounds.

7. The Mouth and Its Important Parts

Lips

The lips help produce sounds such as:

Teeth

The teeth are used in sounds such as:

/f/
/v/
/θ/ as in think
/ð/ as in this

Alveolar Ridge

The alveolar ridge is the raised area just behind the upper front teeth.

It is used to produce:

Hard Palate

The hard palate is the hard part of the roof of the mouth.

It helps produce sounds like:

Soft Palate / Velum

The soft palate is at the back of the roof of the mouth.

It controls whether air goes through:

The mouth, or
The nose

8. Oral and Nasal Sounds

Oral Sounds

When air comes out through the mouth, the sound is called an oral sound.

Examples:

Nasal Sounds

When air comes out through the nose, the sound is called a nasal sound.

Examples:

/m/
/n/
/ŋ/ as in sing

9. Consonants

A consonant is a speech sound produced with some kind of obstruction or narrowing in the vocal tract.

Examples:

Consonants are mainly described in three ways:

Place of articulation
Manner of articulation
Voicing

10. Place of Articulation

The place of articulation tells us where a sound is produced.

1. Bilabial

Both lips come together.

Examples:

/p/ – pen
/b/ – bag
/m/ – man

2. Labiodental

The lower lip touches the upper teeth.

Examples:

/f/ – fan
/v/ – van

3. Dental

The tongue touches or comes close to the teeth.

Examples:

/θ/ – think
/ð/ – this

4. Alveolar

The tongue touches or approaches the alveolar ridge.

Examples:

5. Postalveolar

The tongue is placed slightly behind the alveolar ridge.

Examples:

/ʃ/ – ship
/ʒ/ – measure
/tʃ/ – chair
/dʒ/ – judge

6. Palatal

The tongue moves towards the hard palate.

Example:

/j/ – yes

7. Velar

The back of the tongue touches or approaches the soft palate.

Examples:

/k/ – king
/g/ – go
/ŋ/ – sing

8. Glottal

The sound is produced at the glottis, near the vocal cords.

Example:

/h/ – hat

11. Manner of Articulation

The manner of articulation tells us how the air is blocked or changed to produce a sound.

1. Plosives / Stops

The air is completely blocked for a short time and then released.

Examples:

Example: pen, bag, tea, dog, king, go

2. Fricatives

Air passes through a narrow space and produces friction.

Examples:

/f/ – fan
/v/ – van
/θ/ – think
/ð/ – this
/s/ – sun
/z/ – zoo
/ʃ/ – ship
/ʒ/ – measure
/h/ – hat

3. Affricates

The sound begins with a complete blockage and ends with friction.

Examples:

/tʃ/ – chair
/dʒ/ – judge

4. Nasals

The air passes through the nose.

Examples:

/m/ – man
/n/ – now
/ŋ/ – sing

5. Lateral

The air passes around the sides of the tongue.

Example:

/l/ – light

6. Approximants

The articulators come close together, but there is no strong friction.

Examples:

/r/ – red
/j/ – yes
/w/ – we

12. English Consonant Sounds

English commonly has about 24 consonant phonemes.

Sound	Example
/p/	pen
/b/	bag
/t/	tea
/d/	dog
/k/	cat
/g/	go
/f/	fan
/v/	van
/θ/	think
/ð/	this
/s/	sun
/z/	zoo
/ʃ/	ship
/ʒ/	measure
/h/	hat
/tʃ/	chair
/dʒ/	judge
/m/	man
/n/	now
/ŋ/	sing
/l/	leg
/r/	red
/j/	yes
/w/	we

13. Vowels

A vowel is a speech sound produced without complete obstruction in the mouth.

Examples:

/iː/ as in see
/ɪ/ as in sit
/æ/ as in cat
/ʌ/ as in cup
/uː/ as in food

Vowels are described according to:

Tongue height
Tongue position
Lip position
Length

14. Tongue Height

This shows whether the tongue is:

High/Close
Mid
Low/Open

Close vowels

The tongue is raised high.

Examples:

/iː/ – see
/ɪ/ – sit
/uː/ – food
/ʊ/ – book

Mid vowels

The tongue is in the middle position.

Examples:

/e/ – bed
/ə/ – about
/ɜː/ – bird

Open vowels

The tongue is low.

Examples:

/æ/ – cat
/ɑː/ – father
/ɒ/ – hot

15. Front, Central, and Back Vowels

Front vowels

The front part of the tongue is raised.

Examples:

/iː/
/ɪ/
/e/
/æ/

Central vowels

The tongue is placed in the central area.

Examples:

/ʌ/
/ɜː/
/ə/

Back vowels

The back part of the tongue is raised.

Examples:

/uː/
/ʊ/
/ɔː/
/ɒ/
/ɑː/

16. Long and Short Vowels

Some vowels are traditionally described as long and short.

Long vowels

Examples:

/iː/ – see
/ɑː/ – car
/ɔː/ – saw
/uː/ – food
/ɜː/ – bird

Short vowels

Examples:

/ɪ/ – sit
/e/ – bed
/æ/ – cat
/ʌ/ – cup
/ɒ/ – hot
/ʊ/ – book
/ə/ – about

Note: Actual vowel length can change depending on accent and surrounding sounds.

17. Diphthongs

A diphthong is a vowel sound in which the tongue moves from one vowel position towards another.

Examples:

/eɪ/ – day
/aɪ/ – my
/ɔɪ/ – boy
/aʊ/ – now
/əʊ/ – go (common in British English)
/ɪə/ – near
/eə/ – hair
/ʊə/ – tour

18. Monophthongs

A monophthong is a vowel produced with a relatively stable tongue position.

Examples:

/iː/ – see
/ɪ/ – sit
/e/ – bed
/æ/ – cat

19. What is a Phoneme?

A phoneme is the smallest unit of sound that can change the meaning of a word.

Example

bat /bæt/
pat /pæt/

The difference between /b/ and /p/ changes the meaning.

Therefore:

/b/ and /p/ are different phonemes.

Phonemes are written between slashes:

/p/, /b/, /t/

20. Minimal Pairs

A minimal pair consists of two words that differ in only one sound, and this difference changes their meaning.

Examples:

pin – bin
bat – cat
fan – van
ship – sheep
sit – seat
cap – cup

Minimal pairs help us identify phonemes.

21. Allophones

An allophone is a different pronunciation of the same phoneme that does not change the meaning of a word.

In simple words:

Phoneme = changes meaning
Allophone = different pronunciation, meaning remains the same

Allophones are usually written in square brackets:

[p], [pʰ]

22. Phonetics and Phonology

These two subjects are related but different.

Phonetics	Phonology
Studies actual speech sounds	Studies the organization of sounds in a language
Focuses on production and pronunciation	Focuses on sound patterns
Studies how sounds are made	Studies how sounds function

Simple example

Phonetics: How do we pronounce /p/?

Phonology: How does /p/ behave in English words?

23. The International Phonetic Alphabet (IPA)

The International Phonetic Alphabet, or IPA, is a system of symbols used to represent speech sounds.

The same sound is represented by the same symbol, regardless of spelling.

Example

The letter c can have different sounds:

cat → /k/
city → /s/

Therefore, normal English spelling is not always enough to show pronunciation.

IPA helps us write the exact pronunciation.

24. Transcription

Transcription means writing spoken words using phonetic symbols.

Examples

cat → /kæt/
dog → /dɒg/ or /dɔːg/, depending on accent
pen → /pen/
ship → /ʃɪp/
judge → /dʒʌdʒ/

25. Broad and Narrow Transcription

Broad Transcription

It gives the general phonemic pronunciation.

It is written between slashes:

/pɪn/

Narrow Transcription

It gives more detailed information about the actual pronunciation.

It is written in square brackets:

[pʰɪn]

The small symbol ʰ shows aspiration.

26. Syllable

A syllable is a unit of pronunciation containing a vowel sound.

Examples

cat → 1 syllable
teacher → 2 syllables: teach-er
beautiful → 3 syllables: beau-ti-ful

A syllable may contain:

Onset
Nucleus
Coda

Example: cat /kæt/

Onset = /k/
Nucleus = /æ/
Coda = /t/

The nucleus, usually a vowel, is the central part of a syllable.

27. Stress

Stress means giving extra prominence to a syllable.

A stressed syllable may be:

Louder
Longer
More noticeable

Examples

TAble
beGIN
imPORtant

In IPA, the main stress is marked by ˈ.

Example:

important → /ɪmˈpɔːtənt/

28. Word Stress

Word stress means stressing one syllable more strongly than others.

Example

PREsent – a gift (noun)

preSENT – to give or show (verb)

The position of stress can sometimes change the meaning or grammatical category of a word.

29. Sentence Stress

In a sentence, some words receive more stress than others.

Usually, important words are stressed.

Example:

I WANT a NEW BOOK.

Words such as nouns, main verbs, adjectives, and adverbs often receive more stress.

Grammar words such as a, the, to, and are often unstressed.

30. Rhythm

Rhythm is the pattern of stressed and unstressed syllables in speech.

English speech often has a pattern of strong and weak syllables.

Example:

COME and SEE me toDAY.

Good rhythm makes speech sound more natural.

31. Intonation

Intonation is the rise and fall of the voice while speaking.

Falling Intonation ↘

Often used in:

Statements
Commands
Wh-questions

Examples:

She is coming. ↘

Where are you going? ↘

Rising Intonation ↗

Often used in:

Yes/No questions
Expressions of surprise or uncertainty

Example:

Are you ready? ↗

32. Pitch

Pitch refers to how high or low the voice sounds.

Pitch changes help create:

Questions
Statements
Emotions
Intonation patterns

33. Assimilation

Assimilation happens when one sound becomes more similar to a nearby sound.

This usually happens in connected speech because speakers try to speak more easily and quickly.

Example:

ten boys

The /n/ may be influenced by the following /b/.

34. Elision

Elision means leaving out a sound during natural, fast speech.

Example:

next day

In fast speech, the /t/ may not be clearly pronounced.

35. Linking

Linking happens when words are connected smoothly in connected speech.

Example:

pick_it_up

Instead of pronouncing every word separately, speakers connect them.

36. Weak Forms

Some common grammatical words are pronounced in a weaker form when they are not stressed.

Examples include:

Example:

I want to go.

The word to is often pronounced weakly in normal connected speech.

37. Suprasegmental Features

Features that work above individual sounds are called suprasegmental features.

They include:

Stress
Rhythm
Intonation
Pitch
Length

These features are important for natural and meaningful speech.

38. Important Differences to Remember

Phonetics vs Phonology

Phonetics: Study of speech sounds.
Phonology: Study of how sounds are organized and used in a language.

Phoneme vs Allophone

Phoneme: Changes meaning.
Allophone: Different pronunciation of the same phoneme.

Voiced vs Voiceless

Voiced: Vocal cords vibrate.
Voiceless: Vocal cords do not vibrate.

Oral vs Nasal

Oral: Air comes through the mouth.
Nasal: Air comes through the nose.

Monophthong vs Diphthong

Monophthong: One stable vowel quality.
Diphthong: Movement from one vowel position towards another.

39. Quick Revision Table

Topic	Simple Meaning
Phonetics	Study of speech sounds
Articulatory phonetics	How sounds are produced
Acoustic phonetics	How sounds travel
Auditory phonetics	How sounds are heard
Phoneme	Smallest sound unit that changes meaning
Allophone	Different pronunciation of the same phoneme
Consonant	Sound made with obstruction/narrowing
Vowel	Sound made with relatively open airflow
Voiced sound	Vocal cords vibrate
Voiceless sound	Vocal cords do not vibrate
Place of articulation	Where a sound is produced
Manner of articulation	How a sound is produced
IPA	International system of phonetic symbols
Syllable	Unit of pronunciation
Stress	Extra prominence on a syllable or word
Intonation	Rise and fall of the voice
Rhythm	Pattern of stressed and unstressed syllables
Assimilation	One sound becomes similar to another
Elision	A sound is omitted in connected speech
Linking	Words are joined smoothly

40. Short Exam Definition

What is Phonetics?

Phonetics is the branch of linguistics that deals with the scientific study of speech sounds. It studies how speech sounds are produced by the human speech organs, how they travel through the air, and how they are received by the human ear. The three main branches of phonetics are articulatory phonetics, acoustic phonetics, and auditory phonetics.

One-Line Summary

Phonetics is the scientific study of how humans produce, transmit, hear, and describe speech sounds.