Fill in the blanks:The loudness or feebleness of a sound is determined by the _________of vibration. The intensity of sound is measured in ___________(dB).Pitch or __________are determined by frequency. The number of vibrations per second is called __________.Normal sounds consist of mixed ______. The hearing limit of sounds by human beings is called _________range.Sounds pleasant to listen to are called music and unpleasant to listen to are called ________.

Fill in the blanks:The loudness or feebleness of a sound is determined

1.	Fill in the blanks:The loudness or feebleness of a sound is determined by the _________of vibration. The intensity of sound is measured in ___________(dB).Pitch or __________are determined by frequency. The number of vibrations per second is called __________.Normal sounds consist of mixed ______. The hearing limit of sounds by human beings is called _________range.Sounds pleasant to listen to are called music and unpleasant to listen to are called ________.
Answer» The loudness or feebleness of a sound is determined by the amplitude of vibration. The intensity of sound is measured in decibels (dB). Pitch or shrillness are determined by frequency. The number of vibrations per second is called frequency. Normal sounds consist of mixed frequencies. The hearing limit of sounds by human beings is called audible range. Sounds pleasant to listen to are called music and unpleasant to listen to are called noise.

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