ONE QUESTION, ONE STEP
ZX-4B0229E2F92023年6月A卷 · 第 20 题
2023年6月A卷 · 原库模块 2 · Q20 原库参考解析
An acceptable noise criterion rating for the background noise in a laundry room is 50. For a noise criterion rating of 50, the equation y=22(0.997)x-60+47 gives the estimated sound pressure level, y, in decibels, as a function of the octave band center frequency, x, in hertz, where x≥60. Which of the following is the best interpretation of 47 in this context?
参考答案：
解题思路
容易忽略的一步
