Voiceless Consonants

/p/:

Lips: Pressed together.

Airstream: Stopped and then exploded.

Vocal cords: Not vibrating.

/t/:

Tongue tip: Firmly pressed against gum ridge behind upper front teeth.

Airstream: Stopped and then exploded.

Vocal cords: Not vibrating.

/f/: 

Upper teeth: Touching lower lip.

Airstream: Continuous, without interruption.

Vocal cords: Not vibrating.

/θ/:

Top tip: Between the teeth.

Airstream: Continuous without interruptions.

Vocal cords: Not vibrating.

/s/:

Tongue tip: Near but not touching gum ridge behind upper front teeth.

Airstream: Continuous without interruption.

Vocal cords: Not vibrating.

/ʃ/: 

Tongue tip: Near but not touching upper grum ridge.

Middle of tongue: Near but not touching hard palate.

Airstream: Continuous without interruption.

Vocal cords: Not vibrating.

/tʃ/:

Tongue tip: Firmly pressed against gum ridge behind upper front teeth.

Airstream: Stopped (as for ( t) ) and then released (as for ( long s ))

Vocal cords: Not vibrating.