送交者: steven 于 2010-12-19, 23:02:04:

回答: is it just i(t) ? 由 短江学者 于 2010-12-19, 22:57:29:

• you can express it with complex numbers but in the earphone cord it is just i(t) (无内容) - 短江学者 (0 bytes) 2010-12-19, 23:07:00 (527833)
• besides, when the headphone actually recreates - steven (35 bytes) 2010-12-19, 23:06:16 (527832)
  • you know music, but not sound. (无内容) - OO8 (0 bytes) 2010-12-20, 01:51:08 (527850)
    • you think the sound wave propagates through air - steven (28 bytes) 2010-12-20, 02:05:07 (527857)

加跟贴