作者: Schlemms-Canal 時間: 2025-3-21 22:12 作者: 多樣 時間: 2025-3-22 02:52
Tales of Physicists and Mathematicians (or from) the above mentioned solid structures is caused by motion of the structure surface. In many cases it is the structure-borne sound that is responsible for the resulting sound in air (or sound in liquids). Even the transmission loss of walls, ceilings and windows, etc. is essentially a structural problem.作者: EWE 時間: 2025-3-22 07:56
Phone-In-Shows und Therapie-Talksing a sufficiently high absorption at the walls. On the other hand enhancing the sound for the audience in auditoria like listening rooms and concert halls has to be achieved by indirect reflections, while simultaneously preventing too much reverberation caused by multiple reflections which would, for example, make intelligibility more difficult.作者: 我要沮喪 時間: 2025-3-22 10:45 作者: Horizon 時間: 2025-3-22 15:35
Fundamentals of Room Acoustics, different angles. Each reflection at a (rigid) plane surface can be regarded as coming from a sound source which is mirrored at the wall. To represent multiple reflections, higher order mirror sources have to be assigned to the mirror sources as well.作者: Horizon 時間: 2025-3-22 17:45 作者: 豪華 時間: 2025-3-22 23:07 作者: pus840 時間: 2025-3-23 01:44 作者: STENT 時間: 2025-3-23 05:42 作者: 郊外 時間: 2025-3-23 10:05
https://doi.org/10.1007/978-1-349-04694-2The most common solution to problems due to vibration impact into buildings or the ground, is to isolate the machinery, engines or other aggregates from their bearing foundations by spring elements. Applications for this technique, called elastic decoupling, are作者: 生存環(huán)境 時間: 2025-3-23 17:13
An Analysis Built on Global MeasurementThis chapter deals with the sound transmission between rooms of a building (or from the outside into the building respectively). This subject of practical importance concerns the noise control of indoor rooms with respect to traffic noise and residential noise. Noise, penetrating a room from the exterior, can have two possible reasons:作者: 平靜生活 時間: 2025-3-23 18:44 作者: indemnify 時間: 2025-3-24 00:55 作者: 色情 時間: 2025-3-24 04:10 作者: 壓倒 時間: 2025-3-24 06:39
Propagation and Radiation of Sound,As we know from experience (and as will be shown in the next sections) sound sources have a directivity. The sound level perceived by the observer is not dependent on the distance from the source alone. If the source is rotated, the level changes with angle.作者: 不可救藥 時間: 2025-3-24 13:04 作者: 自愛 時間: 2025-3-24 18:14 作者: 逗留 時間: 2025-3-24 19:40 作者: AV-node 時間: 2025-3-25 01:09 作者: Picks-Disease 時間: 2025-3-25 07:04 作者: GREG 時間: 2025-3-25 07:52 作者: BUDGE 時間: 2025-3-25 11:55 作者: 毛細(xì)血管 時間: 2025-3-25 19:44
Phone-In-Shows und Therapie-Talks example, it is necessary to inhibit the noise emitted by machinery from travelling to areas further away via reflections; one is interested in obtaining a sufficiently high absorption at the walls. On the other hand enhancing the sound for the audience in auditoria like listening rooms and concert 作者: 火光在搖曳 時間: 2025-3-25 22:48
https://doi.org/10.1057/9780230593282epends on the room volume and the room’s interior design; the reverberation time is short in small rooms and in rooms which have large absorbing surfaces. Large volumes with less absorption have reverberation times which can easily extend to a couple of seconds. During a period of 2 s, for instance,作者: 抵消 時間: 2025-3-26 03:00 作者: 支形吊燈 時間: 2025-3-26 07:09
http://image.papertrans.cn/e/image/310690.jpg作者: 作嘔 時間: 2025-3-26 10:09
Springer-Verlag Berlin Heidelberg 2004作者: 彎彎曲曲 時間: 2025-3-26 15:03
Textbook 20041st editioncoincidence effect behind structural acoustic transmission...".A readable and excellent text… unique in several ways… provides an excellent coverage of acoustic fundamentals… The book is excellent in dealing with noise control in interior spaces… excecllent book in the areas covered and it should be作者: cartilage 時間: 2025-3-26 19:38 作者: Trigger-Point 時間: 2025-3-26 23:14 作者: PANEL 時間: 2025-3-27 02:25
https://doi.org/10.1007/978-1-4614-5272-0spersive in gases (see Chap. 4). It is by no means trivial that sound fields do not alter their wave form during transportation. The non-dispersive wave propagation in air is not only important by physical means: imagine that sound incidents in different distances from the source would be composed d作者: 做事過頭 時間: 2025-3-27 07:08
Fundamentals of Wave Propagation,ated sound incidents (e.g. a child rhytmically bouncing a ball, hammers blowing at a construction site, etc.) a time-delay can easily be determined between the optical perception and the arrival of the acoustic signal which increases with increasing distance of the observer from the source. Apart fr作者: fatty-acids 時間: 2025-3-27 13:16
Structure-borne Sound, the term ‘structure-borne sound’. Structure-borne sound has major importance with respect to solving noise control problems: the air-borne sound into (or from) the above mentioned solid structures is caused by motion of the structure surface. In many cases it is the structure-borne sound that is re作者: 深陷 時間: 2025-3-27 14:47 作者: 不規(guī)則 時間: 2025-3-27 21:45 作者: 聚集 時間: 2025-3-27 23:02 作者: Between 時間: 2025-3-28 03:33 作者: 忍耐 時間: 2025-3-28 09:28
,Vorbehalte der P?dagogik,genüber dem naturwissenschaftlichen Naturbegriff rühren unter anderem daher, dass die biologische Natur des Menschen oftmals als der p?dagogischen Beeinflussung unzug?nglich beschrieben wird. Der Mensch als Naturwesen ist demnach nicht erziehbar, nicht bildsam. Je st?rker die Natur Entwicklung und V作者: 鋼盔 時間: 2025-3-28 11:01 作者: 協(xié)議 時間: 2025-3-28 16:59 作者: mediocrity 時間: 2025-3-28 20:01 作者: craven 時間: 2025-3-29 02:42
Application of Geophysical Methods and Equipment to Explore the Sea Bottom acoustic parameters of the sea bottom by continuous profiling..This paper will give a summary of the seismic technique and references for practicable developments in respect to research of the sea bottom.作者: Biguanides 時間: 2025-3-29 04:51
Twin-Hull URRG Blimp Control for Low Altitude Surveillance Applicationented into THCS for horizontal and vertical motion control. Several experiments with a real constructed blimp are performed in indoor environment to confirm the design performance and stability of THCS.作者: 安裝 時間: 2025-3-29 08:23 作者: 小歌劇 時間: 2025-3-29 13:22
essenger to cover all types of extracellular signal molecule, because of the widespread acceptance of the term second messenger to represent the intracellular signal molecules that are produced in response to many of them. I have given the book the title "biochemical messengers", which is a global term to cov978-94-010-5376-1978-94-011-3108-7作者: 慷慨不好 時間: 2025-3-29 15:56 作者: 羅盤 時間: 2025-3-29 20:51
Outer and Inner Approximation in such a way that the sequence of solutions of these relaxed problems converges to a solution of the given problem. This approach, first introduced in convex programming in the late fifties (Cheney and Goldstein (1959), Kelley (1960)) was later extended, under the name of ., to concave minimizatio作者: Fortify 時間: 2025-3-30 00:29 作者: 變白 時間: 2025-3-30 05:37
