\textbf{193-} The amplitude of oscillations of a sound wave decreases by $20$ percent. At a certain point, the sound intensity level decreases by how many decibels? $(\log 2 = 0.3)$
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(1) $1$ \hspace{2cm} (2) $2$ \hspace{2cm} (3) $14$ \hspace{2cm} (4) $20$
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