发布时间:2025-01-17 06:00:08
噪声有很多种类型;
低频噪声,即使噪声值较小,人耳感觉仍然很难听,且能够传很远。
冰箱噪声国标规定的测点在冰箱的前后左右各一个,如果在前面测声压级的话,测点位置为冰箱高度加1米后除以2,测点高度;冰箱长度除以2后加1米;两个数值确定测点位置。
且冰箱产品名牌上面标注出来的噪声值指的是“声功率级”,而不是“声压级”。
程潇在微博发布春节剪窗花vlog你在春节做过最有仪式感的事情是什么
2025-01-17 06:00:08 2025-01-17 06:00:08 2025-01-17 06:00:08 2025-01-17 06:00:08 2025-01-17 06:00:08 2025-01-17 06:00:08 2025-01-17 06:00:08 2025-01-17 06:00:08 2025-01-17 06:00:08我们是四楼业主那个空调架子上的石灰掉下来把一楼的玻璃打碎了需要我们赔吗
2025-01-17 06:00:08 2025-01-17 06:00:08 2025-01-17 06:00:08 2025-01-17 06:00:08 2025-01-17 06:00:08 2025-01-17 06:00:08 2025-01-17 06:00:08 2025-01-17 06:00:08 2025-01-17 06:00:08 2025-01-17 06:00:08 2025-01-17 06:00:08 2025-01-17 06:00:08 2025-01-17 06:00:08 2025-01-17 06:00:08 2025-01-17 06:00:08 2025-01-17 06:00:08 2025-01-17 06:00:08 2025-01-17 06:00:08 2025-01-17 06:00:08 2025-01-17 06:00:08