Identify the wrong pair *
Balshastri Jambhelkar -Digdarshan
Acta Diurna -News paper in the times of Julius Caesar
Kesari and Maratha -Mahatma Jyotiba Phule
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An audio frequency or audible frequency (AF) is a periodic vibration whose frequency is in the band audible to the average human, the human hearing range. The SI unit of frequency is the hertz (Hz). It is the property of sound that most determines pitch.
Audio frequency: AF
Sound pressure: p, SPL,LPA
Sound energy density: w
Sound energy: W
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