Summary: "Sound is mechanical, radiant energy transmitted by the molecules of a medium such as air, water or wood plus a receiver for the sound to be heard." Pitch and frequency are the same thing. Higher pitches have a greater decibel level simply because they are higher. "The song of a canary shows the same intensity as the roar of a gorilla. If the notes are well produced, high tones need no amplification." The Bernoulli effect states that moving air has less pressure than stationary air. This law is what brings the vocal folds together for singing. The Venturi effect states that air moves faster through a narrowing thus air moving through a firmer or smaller glottal opening will create more pressure. Formation of the vowel influences the resonance and intensity of sound. Resonance is a vibration from a source intensified and enriched by supplemental vibration.
Key Concept: The basics of sound should be understood. If we understand these things it can enlighten us about our work in creating the best sound possible.
Connections: Most interesting to me from this chapter is the concept of higher notes not needing to be amplified when sang correctly. A lot of singers try to sing high notes really loud, but when the voice is properly set up the frequency and intensity of the note will carry by itself without extra efforts expended on our part.
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