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  2. Out of Phase Stereo - Wikipedia

    en.wikipedia.org/wiki/Out_Of_Phase_Stereo

    Out of Phase Stereo (OOPS) is an audio technique which manipulates the phase of a stereo audio track, to isolate or remove certain components of the stereo mix. It works on the principle of phase cancellation , in which two identical but inverted waveforms summed together will "cancel the other out".

  3. Dipole speaker - Wikipedia

    en.wikipedia.org/wiki/Dipole_speaker

    For this reason dipole speakers are often used as surround channel speakers, where a diffuse sound is desired to create ambience. A dipole speaker works by creating air movement (as sound pressure waves) directly from the front and back surfaces of the driver, rather than by impedance matching one or both outputs to the air. As a result ...

  4. Dipole antenna - Wikipedia

    en.wikipedia.org/wiki/Dipole_antenna

    German physicist Heinrich Hertz first demonstrated the existence of radio waves in 1887 using what we now know as a dipole antenna (with capacitative end-loading). On the other hand, Guglielmo Marconi empirically found that he could just ground the transmitter (or one side of a transmission line, if used) dispensing with one half of the antenna, thus realizing the vertical or monopole antenna.

  5. Reflective array antenna - Wikipedia

    en.wikipedia.org/wiki/Reflective_array_antenna

    If the resulting array is pointed directly at the source signal, both dipoles will see the same instantaneous signal, and thus their reception will be in-phase. However, if one were to rotate the antenna so it was at an angle to the signal, the extra path from the signal to the more distant dipole means it receives the signal slightly out of phase.

  6. Wave interference - Wikipedia

    en.wikipedia.org/wiki/Wave_interference

    In acoustics, a beat is an interference pattern between two sounds of slightly different frequencies, perceived as a periodic variation in volume whose rate is the difference of the two frequencies. With tuning instruments that can produce sustained tones, beats can be readily recognized.

  7. NBA Power Rankings: Where all 30 teams stand entering the ...

    www.aol.com/sports/nba-power-rankings-where-30...

    The NBA trade deadline is behind us. All-Star Weekend is behind us. About 25 games separate most rosters from the end of the regular season. From the tanking teams to those that refuse to lose ...

  8. Jane Fonda's Fiery SAG Awards Speech Was an Instant Classic - AOL

    www.aol.com/jane-fondas-fiery-sag-awards...

    Over a series of sound gaffes that made the telecast’s production look a bit amateurish, Fonda remained a pro (“I can conjure up voices,” she ad-libbed when interrupted by miscued audio ...

  9. Active noise control - Wikipedia

    en.wikipedia.org/wiki/Active_noise_control

    Sound is captured from the microphone(s) furthest from the mouth (the noise signal(s)) and from the one closest to the mouth (the desired signal). The signals are processed to cancel the noise from the desired signal, producing improved voice sound quality. In some cases, noise can be controlled by employing active vibration control. This ...