標(biāo)題: Titlebook: Applied Acoustics: Concepts, Absorbers, and Silencers for Acoustical Comfort and Noise Control; Alternative Solution Helmut V. Fuchs Book 2 [打印本頁] 作者: ED431 時(shí)間: 2025-3-21 18:49
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作者: 實(shí)現(xiàn) 時(shí)間: 2025-3-21 22:54
ers.Applications and demonstrations of innovative concepts i.The author gives a comprehensive overview of materials and components for noise control and acoustical comfort. Sound absorbers must meet acoustical and architectural requirements, which fibrous or porous material alone can meet. Basics an作者: 事與愿違 時(shí)間: 2025-3-22 01:40
OTC Energy and Related Derivative Markets,ively fall short of certain limits in order to hinder sound as little as possible from entering the actual absorber, e.g. a porous layer. On the other hand, concerning conventional and innovative plate resonators Chap.?5 shows how resonance mechanisms can turn layers covered with heavy steel plates into very effective broadband absorbers.作者: 公共汽車 時(shí)間: 2025-3-22 06:44
Helmholtz Resonators,ively fall short of certain limits in order to hinder sound as little as possible from entering the actual absorber, e.g. a porous layer. On the other hand, concerning conventional and innovative plate resonators Chap.?5 shows how resonance mechanisms can turn layers covered with heavy steel plates into very effective broadband absorbers.作者: 陶瓷 時(shí)間: 2025-3-22 11:13 作者: Fillet,Filet 時(shí)間: 2025-3-22 13:21
Interference Silencers,der normal conditions, especially with regard to the high frequencies. Considering that especially . and . of fibrous or porous damping materials create severe problems, alternative, fiberless absorber technology is urgently needed (Fuchs 2001, 2002).作者: 不知疲倦 時(shí)間: 2025-3-22 19:38
Book 20131st editionand architectural requirements, which fibrous or porous material alone can meet. Basics and applications are demonstrated, with representative examples for spatial acoustics, free-field test facilities and canal linings. Acoustic engineers and construction professionals will find some new basic conc作者: BRIBE 時(shí)間: 2025-3-22 21:14 作者: syncope 時(shí)間: 2025-3-23 04:13 作者: Valves 時(shí)間: 2025-3-23 07:04 作者: cavity 時(shí)間: 2025-3-23 12:45
Energy Access in Sub-Saharan Africa,lations having reduced emission power levels L. of passenger cars, motorcycles and trucks in Europe on average 6, 9, respectively 12?dB(A) in the last 20?years. The decisive . is rising particularly due to surging traffic on an increasingly denser grid of streets, roads and highways. Noise disturban作者: 文件夾 時(shí)間: 2025-3-23 14:41 作者: emission 時(shí)間: 2025-3-23 18:26 作者: CESS 時(shí)間: 2025-3-23 22:17 作者: 替代品 時(shí)間: 2025-3-24 03:33
https://doi.org/10.1057/9781403946041s even narrowband noise spectra, and often are exposed to extreme mechanical, chemical and thermal loads. Every new application presents a challenge and demands innovative solutions, be it to minimize . (in ventilation systems) or to prevent overheating (of engines). In some cases, the soiling probl作者: libertine 時(shí)間: 2025-3-24 08:37 作者: AVANT 時(shí)間: 2025-3-24 14:27 作者: ENDOW 時(shí)間: 2025-3-24 16:35 作者: lesion 時(shí)間: 2025-3-24 20:30
https://doi.org/10.1057/9781403946041d consulting engineers and architects to design current state-of-the-art noise control and room acoustic measures. Special emphasis is on damping at low frequencies and using fiber-free absorbers with smooth closed surfaces, innovative tools and devices to solve acute acoustical problems.作者: 我不死扛 時(shí)間: 2025-3-24 23:47
Finance and Capital Markets Seriesview of the first edition of this book with this provocative question: “Where do most acousticians work? As owners or employees of acoustic engineering firms? In teaching or research? In the building industry? For noise control authorities? Wrong. The answer is: in the automobile industry. All impor作者: trigger 時(shí)間: 2025-3-25 06:39
https://doi.org/10.1057/9781403946041rooms (see Chaps.?. and .), the amount of . required for a specific . (a) plays an important role particularly in view of low frequencies, because this can directly influence the construction costs of a building. The .. (b) and . (c) of porous/fibrous damping materials can be improved by acousticall作者: 投射 時(shí)間: 2025-3-25 11:20
Policy: Energy Demand and Welfare in the UK,From the emission sound-power level L. of a source Q, which can be determined under freefield conditions, e.g. according to DIN 45 635 (1984), respectively ISO 3745 (2003), the immission sound pressure level L in its vicinity (outdoors) can be described, of course only schematically, by:作者: 有花 時(shí)間: 2025-3-25 13:07
Energy Power and Automation EngineeringBased on the range of applications and market volume, by far the largest and most important group of sound absorbers is founded on the principle of providing sound waves upon impact, according to Fig.?3.1, as little resistance W as possible.作者: multiply 時(shí)間: 2025-3-25 18:51 作者: Phenothiazines 時(shí)間: 2025-3-25 21:45
Passive Absorbers,Based on the range of applications and market volume, by far the largest and most important group of sound absorbers is founded on the principle of providing sound waves upon impact, according to Fig.?3.1, as little resistance W as possible.作者: Myosin 時(shí)間: 2025-3-26 00:50
Sound Absorption for Noise Control and Room-Acoustical Design,ared to its wavelength l, it is partially reflected (P.) (and possibly diffracted and scattered), allowed to pass through (P.), transmitted as structure-borne sound (P.), as well as absorbed (P.), see Fig.?3.1.作者: 斥責(zé) 時(shí)間: 2025-3-26 05:45
Sound Absorbers in Room Acoustics,d consulting engineers and architects to design current state-of-the-art noise control and room acoustic measures. Special emphasis is on damping at low frequencies and using fiber-free absorbers with smooth closed surfaces, innovative tools and devices to solve acute acoustical problems.作者: 忍耐 時(shí)間: 2025-3-26 09:35 作者: 漂亮 時(shí)間: 2025-3-26 15:19 作者: 宣傳 時(shí)間: 2025-3-26 19:19 作者: 指耕作 時(shí)間: 2025-3-26 21:18
https://doi.org/10.1057/9781403946041d consulting engineers and architects to design current state-of-the-art noise control and room acoustic measures. Special emphasis is on damping at low frequencies and using fiber-free absorbers with smooth closed surfaces, innovative tools and devices to solve acute acoustical problems.作者: 高深莫測 時(shí)間: 2025-3-27 03:41
Helmut V. FuchsFundamentals of and recent advances in noise control and room acoustic design.Description and application of innovative absorbers and silencers.Applications and demonstrations of innovative concepts i作者: 單調(diào)性 時(shí)間: 2025-3-27 08:30
http://image.papertrans.cn/a/image/159617.jpg作者: 價(jià)值在貶值 時(shí)間: 2025-3-27 12:21
Introduction,lations having reduced emission power levels L. of passenger cars, motorcycles and trucks in Europe on average 6, 9, respectively 12?dB(A) in the last 20?years. The decisive . is rising particularly due to surging traffic on an increasingly denser grid of streets, roads and highways. Noise disturban作者: FISC 時(shí)間: 2025-3-27 15:27
Sound Absorption for Noise Control and Room-Acoustical Design,ared to its wavelength l, it is partially reflected (P.) (and possibly diffracted and scattered), allowed to pass through (P.), transmitted as structure-borne sound (P.), as well as absorbed (P.), see Fig.?3.1.作者: GRAZE 時(shí)間: 2025-3-27 19:42
Panel Absorbers,ive absorbers. Due to their market dominance, they also predominate in all the standard literature on absorbers and silencers. When combined with conventional foil facings as air-tight protective layers against abrasion, their mass should not exceed a certain limit according to Eq.?(.) in order to i作者: overweight 時(shí)間: 2025-3-28 00:48
Helmholtz Resonators,acoustic damping material. Here the effective plate thickness t., respectively the perforation ratio s according to Eq.?(.) should not exceed, respectively fall short of certain limits in order to hinder sound as little as possible from entering the actual absorber, e.g. a porous layer. On the other作者: Obvious 時(shí)間: 2025-3-28 05:55 作者: Engulf 時(shí)間: 2025-3-28 06:53
Absorbers with Active Components,iness. The compound panel resonators of Sect.?5.3, the membrane absorbers of Sect.?6.3 and the tubular silencers of Sect.?7.3 represent new fiberless variants with particularly high, broadband effectiveness at low frequencies. “Active noise abatement” measures, also called “anti-noise”, nevertheless作者: Morbid 時(shí)間: 2025-3-28 13:43
Microperforated Absorbers,aterials with passive, i.e. non-reactive behavior toward airborne sound waves. More recently, various types of absorbers gain importance which react quite differently to the sound field that excites them (Chaps.?.–.). Whether the vibrations occur in panels, foils or membranes (Chaps.?. and .) or in 作者: Cumulus 時(shí)間: 2025-3-28 14:48
Integrated and Integrating Sound Absorbers,, pointing out the special low-frequency problem. The following Chaps.?4–9 present an up-to-date overview of different effects and designs of state-of-the-art as well as some novel marketable airborne sound absorbers, focusing on classifying and describing the physical damping mechanisms, which diff作者: SKIFF 時(shí)間: 2025-3-28 21:55
Sound Absorbers in Room Acoustics,d consulting engineers and architects to design current state-of-the-art noise control and room acoustic measures. Special emphasis is on damping at low frequencies and using fiber-free absorbers with smooth closed surfaces, innovative tools and devices to solve acute acoustical problems.作者: needle 時(shí)間: 2025-3-29 01:24 作者: 透明 時(shí)間: 2025-3-29 06:14
Silencers in Flow Ducts,rooms (see Chaps.?. and .), the amount of . required for a specific . (a) plays an important role particularly in view of low frequencies, because this can directly influence the construction costs of a building. The .. (b) and . (c) of porous/fibrous damping materials can be improved by acousticall作者: 敏捷 時(shí)間: 2025-3-29 11:19 作者: GLUE 時(shí)間: 2025-3-29 13:36
Lecture Notes in Electrical Engineeringunit area is not small but very large compared to the air mass moved with the sound wave according to Eq.?(.). Such a mass is only able to react with the sound field if rendered excitable as part of a resonance system.作者: Flat-Feet 時(shí)間: 2025-3-29 17:49
https://doi.org/10.1057/9781403946041r than using extremely thin mineral fibers in initially comparatively coarse structures and it originally stems from Russian research by Rschevkin and Terossipjantz (1941), Rschevkin (1959) and Veliszhanina (1951). However, it was thanks to an old Chinese master acoustician, Maa (1975), that . (MPA)作者: evaculate 時(shí)間: 2025-3-29 21:40
Value At Risk and Stress Testing,e kHz range (see Figs.?13.38 and 13.39) and passive materials with correspondingly larger depths as “bass traps” e.g. in music studios or class rooms for frequencies down to far below 100?Hz, (see Everest, The master handbook of acoustics, 1994) or Sect.?10.3.作者: nocturia 時(shí)間: 2025-3-29 23:58
Finance and Capital Markets Seriesder to give the driver the sound that fits the respective power chosen: softly purring like a kitten or roaring like a lion. These technically and physically challenging developments however call for sophisticated testing facilities to minimize noise emissions and optimize internal noises.”作者: 衰老 時(shí)間: 2025-3-30 04:17 作者: homeostasis 時(shí)間: 2025-3-30 08:51
Applied Acoustics: Concepts, Absorbers, and Silencers for Acoustical Comfort and Noise ControlAlternative Solution
