Don't forget for each sound you need to put double slash or
bracket.
/ θ / / ð /
[θ ] [ð ]
/ θ /
Tongue tip : Between
the teeth
Airstream : Continuous
without interuption
Vocal cord : Not
vibrating
For Example : Thorn,
Method, and Path
/ ð /
Tongue tip : Between
the teeth
Airstream : Continuous
without interuption
Vocal cord :
Vibrating
For Example : Those,
Brother, and Smooth
And here are the video on Youtube to hear clearly each sound
American style
/ θ / https://www.youtube.com/watch?v=qC0l6GQZtM4
/ ð / https://www.youtube.com/watch?v=GdtdTJkRtkE
British Style
/ θ / https://www.youtube.com/watch?v=Fq1atdudgh8
/ ð / https://www.youtube.com/watch?v=EZb_EWVCUoE
Let’s next to / s /
& / z /