[填空题]
Human beings can typically detec )n4wc:sg)zb n4wp.3krx1tm ;s5fqh k t a difference in sound level of 2.0 dB. What is the ratio of the amplitudes of two sounds whose levels differ by this amount? [Hint: See Section 11hrwx 43sqpm.k5k f;1t–9.]$\approx$
