
目的 織物の通気抵抗を測定し, 吸音特性に及ぼす通気抵抗の影響を究明する. 成果 (1) 織物の通気抵抗Rfは流速Vの関数としてRf=Ai+BiVで表わされる.AiとBiは密度と組織によって定まる常数である.同一組織であれば, 密度が小さい織物はBδ≒0, 密度が大きくなるとAi, Biともに増加する. (2) 流速の遅い範囲でRf-Aiとみなせる織物の吸音機構は完全粘性抵抗型である. (3) 完全粘性抵抗型の織物の吸音特性と通気抵抗Rfの間にはつぎの関係が成立つf0= (c/4-aiRf) d-1;α ∞=a'iRfここにα∞;最大吸音率, f0;α ∞ を示す振動数, d;織物の背後空気層の長さ, c;音速, a'i, ai;組織によって定まる常数である.
| selected citations These citations are derived from selected sources. This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | 6 | |
| popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network. | Top 10% | |
| influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | Top 10% | |
| impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network. | Average |
