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Fill in the blanks a)______ is produced by a vibrating object.b)Veena and sitar are example of instruments.c)The ______ nerve sends impulses to the brain from the ear.d)Two ligaments called ______ are stretched across the larynx.e)Sounds of frequency more than ______ Hz are called ultrasonic sounds.f)________ is a sound that is not pleasing to the ears.​

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