Voiceless "th" is given the Greek letter Theta, like the picture at the following link. This is used in words like "thin" and "thermometer."
Example of Theta:
http://upload.wikimedia.org/wikipedia/commons/d/de/Greek_lc_theta.png
"With" uses the unvoiced th sound.
The "th" sound can be pronounced in two ways: voiced and voiceless. The voiced sound is like the "th" in "this," while the voiceless sound is like the "th" in "think." Practice making these sounds by placing your tongue between your teeth and blowing air out softly.
The "th" sound in the word "thimble" is voiceless. It is produced without vibration of the vocal cords.
The two different sounds of "th" in English words are the voiced "th" sound, as in "this", where the vocal cords vibrate, and the voiceless "th" sound, as in "think", where the vocal cords do not vibrate.
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The Runic TH character is a symbol in the runic alphabet used in Germanic languages before the adoption of the Latin alphabet. It represents the "th" sound, similar to how "th" is pronounced in English words like "the" or "thing." The Runic TH character is often depicted as a combination of the runes for "T" and "H."
It has /th/ sound, you should follow the following instructions:Put you upper front teeth on your lower front teeth, they should be in contact.Place your tongue in the middleAllow airflow between your teethRelease your teeth by opening your mouth forming it a rounded shapeBy doing step 4 is the same like pronouncing the word "saw" but the difference is that you include /th/ sound.Note: The /th/ sound here must be voiceless. Examples of voiceless /th/ sounds are thank in the expression "Thank you", words such as "thought", "think", "beneath", etc.
The 24th and last one.
Sure! Some examples of International Phonetic Alphabet (IPA) symbols include /s/ for the sound "s" in "sit," /ʃ/ for the sound "sh" in "she," and /ð/ for the sound "th" in "this."
The Latin Alphabet (somewhat erroneously called the Roman Alphabet).
Voiced consonants - b, d, th (as in then), v, l, r, z, j (as in Jane) Voiceless or unvoiced consonants - p, t, k, s, sh, ch, th (as in thing)
The phenomenon of accent really stems from phonetic influence of first-language influence on the second language, in this case, the phonetics of Mandarin or Cantonese on that of English. One of the major features of Chinese phonetics is the paucity of voiced consonants. E.g. the "d" in "大" (Mandarin: da; Cantonese: daai) is voiceless, while the "d" in "dog" in English is voiced. So a native Chinese speaker when speaking in English mistakenly think the two "d"s are the same and thus pronounce and "d" in "dog" as voiceless, which is the case in their native language. To extend that, native Chinese speakers also tend to "unvoice" the supposedly voiced consonants "g", "b", "z", etc. in English too, producing an accent. Of course this is only one reason for the rise of a "Chinese accent". Other factors include the difference in "r", lack of "th" in Chinese, etc.