Pleasant sound can be any sound that doesn't harm or effect your ear drums.
A pleasant complex sound is a consonance, an unpleasant is a dissonance
pleasant sound? softness and low pitch unpleasant sound? loudness and low pitch
A sound wave
not pleasant or agreeable
Pleasant: a melody played on a piano. Unpleasant: random banging on piano keys. Pleasant: a beautiful singing voice. Unpleasant: a song sun off key. Pleasant: a cat's meow. Unpleasant: the roar of a lion. Pleasant: a thunderstorm. Unpleasant: the sound of a tornado. Pleasant: a smoothly running motor. Unpleasant: a motor that knocks.
A pleasant fart-sounding noise
music that you enjoy, laughter, soft rainfall.
Ultimate waves
pleasant sound? softness and low pitch unpleasant sound? loudness and low pitch
Pleasant sounds are pleasing to the mind and often stimulates the brain. Noise often gives you headaches :)
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