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Describing vocal sound is an inexact science largely because the human voice is a self-contained instrument. Since the vocal instrument is internal, the singer's ability to monitor the sound produced is complicated by the vibrations carried to the ear through the Eustachean (auditory) tube and the bony structures of the head and neck.
In physics, sound is a vibration that propagates as an acoustic wave through a transmission medium such as a gas, liquid or solid. In human physiology and psychology, sound is the reception of such waves and their perception by the brain. [1]
"An accomplished elocutionist", an illustration of elocutionist performing an open-air recitation, published in The Strand Magazine in 1891. Elocution is the study of formal speaking in pronunciation, grammar, style, and tone as well as the idea and practice of effective speech and its forms.
The definition of sound, simplified, is a hearable noise. The tree will make a sound, even if nobody heard it, simply because it could have been heard. The answer to this question depends on the definition of sound. We can define sound as our perception of air vibrations. Therefore, sound does not exist if we do not hear it.
The horizontal axis shows frequency in Hertz. In acoustics, loudness is the subjective perception of sound pressure.More formally, it is defined as the "attribute of auditory sensation in terms of which sounds can be ordered on a scale extending from quiet to loud". [1]
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The direct method in teaching a language is directly establishing an immediate and audiovisual association between experience and expression, words and phrases, idioms and meanings, rules and performances through the teachers' body and mental skills, without any help of the learners' mother tongue.