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Nondirectional & Inaudible Bass: What Frequencies?

    https://forum.audiogon.com/discussions/nondirectional-inaudible-bass-what-frequencies#:~:text=Moncrieff%27s%20research%20shows%20that%20bass%20becomes%20non-directional%20or,subs%20sound%20very%20different%20from%20front%20loaded%20subs.
    none

At what freq. does sound become non-directional?

    https://forum.audiogon.com/discussions/at-what-freq-does-sound-become-non-directional
    I've heard bass is non-directional below 60 Hz, 100 Hz, 160Hz. Don't believe it. There is no bass like stereo bass. Period.

Whats the highest frequency for non-directional sound?

    https://www.caraudiojunkies.com/showthread.php?4933-Whats-the-highest-frequency-for-non-directional-sound
    Re: Whats the highest frequency for non-directional sound? 6" would be fine up to about 600hz. 8" would be fine up to about 400hz to stay within the green. To figure this out you can just use the formula of Frequency = Speed / wavelength (or 4*diameter in feet). Frequency = 1125 Ft/s / (4* 8"/12")

At what freq does bass become nondirectional? | AVS Forum

    https://www.avsforum.com/threads/at-what-freq-does-bass-become-nondirectional.275558/
    Theoretically it becomes non-directional when the sound wavelength is longer then the distance between our ears. Our brain determines where the sound came from by checking the delay between when the sound hits our left ear and right ear. ... and a mix of the two in the frequency range between them. This has been known since the early 1930s when ...

At what freq does bass become non-directional ...

    https://www.diymobileaudio.com/threads/at-what-freq-does-bass-become-non-directional.5456/
    As the title says, around what frequency does bass become non-directional. For example, if my front door woofers are playing from 60-280 hz, can I run them mono? The mid's and tweet's would still be stereo and time corrected. If not - how critical is time alignment in this range (60-280)...

Why high frequencies are directional and low aren't?

    https://www.theaudioblog.org/post/why-high-frequencies-are-directional-and-low-aren-t
    High frequency sound waves are high frequency because they repeat many times in one second. A 10 KHz waves repeats 10.000 times in a second. A 10 KHz waves repeats 10.000 times in a second. Since sound speed is 343 m/s at room temperature, that means that each air oscillation is very short: 0.1126 feet or 0.03432 meters .

Why Are Low Frequencies Non Directional And High ...

    https://www.thenakedscientists.com/forum/index.php?topic=28796.0
    Low frequency sound travels further than high because the high frequency sound energy is more rapidly converted into heat: if the transfer of sound energy to heating the medium (e.g. air) is x% per cycle the more cycles per second means more rapid loss of sound energy. This is why when a boyracer approaches you can hear the banging bass of his ...

Directional sound - Wikipedia

    https://en.wikipedia.org/wiki/Directional_sound
    See sound from ultrasound for a beam of ultrasound that makes audible sound in a restricted target area without a receiving set.. Directional Sound refers to the notion of using various devices to create fields of sound which spread less than most (small) traditional loudspeakers. Several techniques are available to accomplish this, and each has its benefits and drawbacks.

At what frequency does sound become too directional for …

    https://www.reddit.com/r/audiophile/comments/1nymj2/at_what_frequency_does_sound_become_too/
    Assuming the sub isn't a boomy, poorly-designed mess then an 80 or even 100Hz crossover can work pretty well. You have to remember that a typical subwoofer crossover is 12dB/octave which means that a sound one octave above the crossover (160Hz) will only be 12dB quieter than a sound at the crossover frequency (80Hz).

Navigation Aids - Federal Aviation Administration

    https://www.faa.gov/air_traffic/publications/atpubs/aim_html/chap1_section_1.html
    These facilities normally operate in a frequency band of 190 to 535 kilohertz (kHz), according to ICAO Annex 10 the frequency range for NDBs is between 190 and 1750 kHz, and transmit a continuous carrier with either 400 or 1020 hertz (Hz) modulation.

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