[過去ﾛｸﾞ] 最強のブックシェルフスピーカー 41 (1002ﾚｽ)
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698(1): (ﾜｯﾁｮｲ 7a5d-qjag) 05/21(火)08:50 ID:qA4DaHDT0(3/5) AAS
>>697
外部ﾘﾝｸ:blog.miscospeakers.com
Low frequency measurement is where the NFS has a distinct advantage. An NFS operates in a normal room, with a microphone that is within the “near field” of the speaker, usually 10 - 15cm away.
It then encircles the speaker making many measurements to create a 360° radiation pattern (or “balloon” as it is sometimes called).
Then, using complex math, Klippel software extrapolates the data to determine how the speaker would sound further away (the “far field”) and creates an acoustical model for the low frequency information it has gained through measurement, thus solving the wavelength/dimension problem.

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700(1): (ﾜｯﾁｮｲ 7a5d-qjag) 05/21(火)08:58 ID:qA4DaHDT0(5/5) AAS
動画ﾘﾝｸ[YouTube]
Erin's Audio CornerのKlippel NFSの紹介動画
15:40ぐらいから実際に動作してる様子が見れるが
普通の部屋でやってる
>>698のブログに載ってる動画でも通常の部屋でやってた

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