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Results tagged with radio
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user 80
3
votes
If you had supersonic hearing, would you be able to hear the carrier wave of an AM radio sta...
The AM or medium wave band extends from 526.5 kHz to 1606.5 kHz in Europe or 535 kHz to 1705 kHz in the US.
Ultrasound (not supersound! :-) frequencies range from 20kHz and up:
However, a bigger …
- 26k
2
votes
The transmission distance of a signal
A really simple approach is to just use the Friis transmission formula:
$$\frac{P_r}{P_t} = D_t D_r \left( \frac{\lambda}{4\pi d} \right)^2$$
which leads to the free space path loss formula (in dB):
$ …
- 26k