Today, a researcher retires to the woods with a portable tape recorder and a dishlike parabolic microphone and waits for the singing to begin.
12.
Parabolic acoustic mirrors are widely used in parabolic microphones to pick up sound from great distances, employed in surveillance and reporting of outdoor sporting events.
13.
Parabolic microphones are not typically used for standard recording applications, because they tend to have poor low-frequency response as a side effect of their design.
14.
This attack is inexpensive because the other hardware required is a parabolic microphone and non-invasive because it does not require physical intrusion into the system.
15.
Parabolic microphones are generally not used for high fidelity recording applications because dishes small enough to be portable have poor low frequency ( bass ) response.
16.
In parabolic microphones, a parabolic reflector that reflects sound, but not necessarily electromagnetic radiation, is used to focus sound onto a microphone, giving it highly directional performance.
17.
I'm thinking you could use echolocation to find objects in front of the vehicle and then aim a parabolic microphone at each one to listen for a heartbeat.
18.
A typical parabolic microphone dish with a diameter of one metre would have little directivity for sound waves longer than 30 cm, corresponding to frequencies below 1 kHz.
19.
The most common modern applications of the parabolic reflector are in satellite dishes, reflecting telescopes, radio telescopes, parabolic microphones, solar cookers, and many PAR lamps and LED housings.
20.
It's in the same class as watching the neighbors fight when their drapes are open, although I don't think binoculars and a parabolic microphone wouldbe needed in your case.
