fundamentals and overtones - What does the quality of sound depend upon?, larynx, sinuses, teeth - What directly effects your speech?, amplitude of the wave - What is loudness dependent upon?, frequency - What determines the pitch of a sound?, solid - What does sound travel through the fastsest?, gas - What does sound travel through the slowest?, decibel - What is the SI unit for intensity?, longitudinal - What type of wave is a sound wave?, reverberation - What causes the echoes in an empty room?, quality - The difference between the same note played on two different instruments?, high - What type of density does the crest of a wave have?, low - What type of density does the trough of a wave have?, medium, vibrating object, particles - What must be present for sound to occur?, inner ear - What section of the ear converts sound into nerve impulses?, larynx - Where are the vocal cords located?, soft - What type of surfaces absorb sound?, hard - What type of surfaces reflect sound?, ultrasonic - Which sounds are above the range of human hearing?, Durham - First person to measure the speed of sound?, infrasonic - Which sounds are below the range of human hearing?, threshold of hearing - Softest sound a person can detect?, threshold of pain - the limit of sound before it becomes painful, sound - What form of energy is detectable by the human ears?, tension of the vocal cords - How do we control the pitch of our voice?, pitch, intensity, quality - Three measurable properties of sound waves, outer, middle, inner - What are the three sections of the ear?, sound navigation and ranging - What does sonar stand for?, inflamed membranes - Why does your voice sound different with a cold?, epiglotts - What keeps food from entering the lungs?, auditory nerve - What transmits nerve impulses to the brain?,

Physical Science Chapter 13

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