Voiceless dental and alveolar trills

Voiceless dental and alveolar trills are special sounds made when speaking certain languages. These sounds are made by vibrating the tongue against the teeth or the roof of the mouth, but without using the voice box. This makes them different from the more common "r" sound found in many languages.

These sounds appear in only a few languages and are usually found alongside a voiced version of the same sound. One example comes from ancient times. In Proto-Indo-European, an early language that many modern languages come from, a sound written as *sr changed over time. In Ancient Greek, this sound was written as ⟨ῥ⟩, using the letter for /r/ with a special mark showing a breathy sound /h/. Scholars think this was a voiceless alveolar trill and it became a common beginning sound for words starting with /r/ in Attic Greek. However, this special sound is no longer found in Modern Greek.

An example of this change can be seen in the word from Proto-Indo-European *srew- which became the Ancient Greek word ῥέω, meaning "flow". This word likely sounded like [r̥é.ɔː], showing the voiceless trill sound at the beginning.

Features

The voiceless alveolar trill is a special sound made when air passes over a part of the mouth to create a vibrating effect. This sound is created either behind the upper front teeth, at the ridge behind the teeth, or just behind that ridge, usually using the tip of the tongue.

Unlike some sounds, this one is made without the vocal cords shaking. It is an oral sound, meaning the air does not escape through the nose, and the air is pushed out using muscles in the chest and belly.

Occurrence

Voiceless dental and alveolar trills are special sounds made when speaking. They are like the sound “r” but are made without using the voice. These sounds are found in only a few languages and usually appear together with a version that uses the voice.

Voiceless alveolar fricative trill

See also: Voiced alveolar fricive trill

A voiceless alveolar fricive trill is a special sound that is not commonly used as a main sound in any language, though it might appear in a special form of a language spoken in a place called East Sakhalin. It can sometimes be heard in Czech when certain sounds are made together.

Features

Here are some facts about this sound:

• It is made by rubbing the tongue against the top of the mouth in a special way.
• It is created without using the voice, so it sounds quiet and hissy, like air being let out.
• The air is pushed out only through the mouth, not the nose.
• The sound is made by using muscles in the chest and belly to push the air out.