UTTER
In a word phase letter s gives sound of z(buzzing sound)
"the word of the sound of your voice with four letters" is grammatically incorrect.
In the word "carcass," the letter "s" makes a /s/ sound, like in "snake."
In the word "pose," the letter "s" makes the /z/ sound like in "his." In the word "soft," the letter "s" makes the /s/ sound like in "sit." In the word "wise," the letter "s" makes the /z/ sound like in "his."
The long vowel sound for 'Y' would make a long 'E' sound. Such as in the word 'Any' and 'Penny'.
Autotune.
The meaning of the word boom is: to make a resonant sound, like artillery; "His deep voice boomed through the hall."
To make that particular sound you need to inflect the tone of your voice.
Creak
The letter Y has a long I sound in typhoon. (The same is true of the word typhoid.)
The CE make the S sound but are silent
ks as in English. In some words, it is pronounced like the spanish J (an emphatic h sound). In medieval spanish, it was pronounced like SH.