1) It refers to highness or lowness of the sound. a) Amplitude b) Pitch c) Loudness d) Quality 2) It is the outer part of the ear. a) Pinna b) Cochlea c) Incus d) Stapes 3) This characteristic can distinguish the sound of one instrument from the other. a) Quality b) Pitch c) Loudness d) Intensity 4) Bats can heard up to 10000 Hz. They are example of? a) Ultrasound b) Infrasound c) Audible d) No sound 5) Dog's whistle cannot hear by the human. What classification of sound does the dog produced? a) Infrasound b) Ultrasound c) Audible d) No sound.

Science 7

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