Question

What are the audible limits of the Amplitude Modulated (AM) continuous downward swept-tone signal? Signal does not contain any information about the beacon or user.

1) 20 and 20 Hz
2) 20 and 20000 Hz
3) 20 and 200 Hz
4) 200 and 20000 Hz

Answer 1

The audible limits for a swept-tone signal that a human can hear range from 20 Hz to 20,000 Hz, matching the normal human hearing range.

Step-by-step explanation:

The question pertains to the audible limits of an Amplitude Modulated (AM) continuous downward swept-tone signal within human hearing range. The human ear can detect sounds in a range from about 20 Hz to 20,000 Hz. Sounds below 20 Hz are termed infrasound and those above 20,000 Hz are termed ultrasound. Therefore, the correct option for the audible limits of this swept-tone signal is 20 Hz to 20,000 Hz.