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تراز شدت صوتی ۱۵ دسی بل است. شدت این صوت، چند برابر شدت صوت مبنا است؟ ( log 2 = 0/3 ) Chera mishe 32chera 30 nmishe
erfan199 در Test fizik 93 T گفته است:
what On 5 log 2 Ro che joriii neveshtin
log2=0.3 1.5=5*0.3
Mrc fahmidam
خواهش میکنم!