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<blockquote data-quote="sportteo" data-source="post: 1057818883" data-attributes="member: 6565"><p>Σωκράτη λογικό μου φαίνεται αυτό που γράφεις ,αν και το αρθρο του hifi choice (νομίζω, άλλωστε πέρασαν και πολλά χρόνια από τότε) ανέφερε ότι χρειάζεται σχεδόν ένα γήπεδο ποδοσφαίρου για απόκριση των <u>ηχείων</u> στα 25-30 hz.Δεν επιμένω ωστόσο .:antlers:</p><p>Ψάχνοντας βρήκα αυτό [h=2]Background[/h] Humans hear frequencies from 20 Hz up to 20,000 Hz. The lowest bound, 20 Hz, with a wavelength of nearly 20 meters, is a frequency we feel rather than actually hear. This test helps you benchmark the lowest limit of your audio system's frequency extension.</p><p> Because of their increased wavelength (nearly 20 meters at 20 Hz), achieving high output at low frequencies usually requires large drivers (subwoofers). Headphones or earbuds, have less trouble playing back those low frequencies despite their small size: by sealing your ear canal, they create a volume that acts as a pressure chamber. This phenomenon is totally different from what you hear when listening to a speaker playing in the open air. Without the <em>cabin effect</em> — another name for the same phenomenon — earbuds would produce hardly any bass.</p><p> <a href="http://www.audiocheck.net/audiotests_frequencychecklow.php" target="_blank">http://www.audiocheck.net/audiotests_frequencychecklow.php</a></p></blockquote><p></p>
[QUOTE="sportteo, post: 1057818883, member: 6565"] Σωκράτη λογικό μου φαίνεται αυτό που γράφεις ,αν και το αρθρο του hifi choice (νομίζω, άλλωστε πέρασαν και πολλά χρόνια από τότε) ανέφερε ότι χρειάζεται σχεδόν ένα γήπεδο ποδοσφαίρου για απόκριση των [U]ηχείων[/U] στα 25-30 hz.Δεν επιμένω ωστόσο .:antlers: Ψάχνοντας βρήκα αυτό [h=2]Background[/h] Humans hear frequencies from 20 Hz up to 20,000 Hz. The lowest bound, 20 Hz, with a wavelength of nearly 20 meters, is a frequency we feel rather than actually hear. This test helps you benchmark the lowest limit of your audio system's frequency extension. Because of their increased wavelength (nearly 20 meters at 20 Hz), achieving high output at low frequencies usually requires large drivers (subwoofers). Headphones or earbuds, have less trouble playing back those low frequencies despite their small size: by sealing your ear canal, they create a volume that acts as a pressure chamber. This phenomenon is totally different from what you hear when listening to a speaker playing in the open air. Without the [I]cabin effect[/I] — another name for the same phenomenon — earbuds would produce hardly any bass. [URL]http://www.audiocheck.net/audiotests_frequencychecklow.php[/URL] [/QUOTE]
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