Fig. 4. The acoustic wave and its length by the frequency is so maa that are not syszalne call infr

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This paper concerns the fundamental issues connected with the selection materiawdwikochonnych technique commonly used in construction as part of the acoustic ustrojw. Now zrobibym it differently. These types of materials are chosen by rnych kryteriw up for a particular applications by testing acoustic ANTI Haas to improve urban and Acoustic Properties of architectural structures, (and our studio guitar ..).
In the second chapter toastess warming tray are located aim, is to measure Properties ktrym dwikoizolacyjnych toastess warming tray kryteriw selected materiawi develop their selection in a specially designed acoustic chamber. toastess warming tray
The fourth section contains a description of the acoustic chamber useful in the study of acoustic materiawdwikochonnych Properties. Have been described tools needed to perform the test and sposb podczenia them to your computer.
3.2.1 phenomena in acoustic screens. 22
6.1.3 Effect of pollution toastess warming tray on Tumi pyowych PE foam. 48
7.3 tumienia dependency of the surface density 66
Haas has many definitions. The scientific work in the field of occupational medicine dwikwo describe the negative influence of high nateniach on the human body, and even dry eyes. Haas is a sound or sounds harmful to human Suchu, subjectively unpleasant person exposed areas [1]. Their level, size, characteristics of acoustic parameters omwione describe in this chapter. Zoony baffle with elementwdwikochonnych should be chosen so as to reduce to the level determined haas for the type of terrain by haasu standards [2, 3, 4, 5 ].
Sounds emerging during przedmiotw harmonic motion, vibration machines and instrumentw, przepywajcego prdu wgonikach like. These vibrations induced intentionally or not to come into contact oddziauj Allow up to these ciaami gases, liquids and other ciaa internships [2].
The above pendulum sprynowe toastess warming tray in Figure 1 is ciarek a certain area on sprynie suspended upon a fixed sprystoci of hands in the air [7, 8]. As we know, such a move is tumiony air friction toastess warming tray and losses in the material. Part of the vibration energy is transferred periodically into the air and with proper vibration amplitude and frequency as the sound emitted spring.
This creates a wave, worodku gas. A wave is a disturbance of the state of rwnowagi. This gas czstki mae-moving gas rwna in tact. Gdybymy in a sound stage "looked into the interior" ktrym gas travels up the sound, it zauwaylibymy, areas arranged alternately: For larger areas and smaller g stoci particles from (ie, a smaller or larger pressure of) [2, 8]. In addition to these areas rozprzestrzeniay up. If the sound rdem byby point: it is the sound wave as rosnca rozprzestrzeniaby a wok sphere that point. Powstaway alternately to arable toastess warming tray areas zagszczeniu particles from the air (Fig. 2).
If the sound rdem byaby drgajca paszczyzna marked red (Fig. 3), wwczas wikszym areas and less pressure of byyby r wnolegymi paszczyznami przemierzajcymi toastess warming tray resort with speed-dependent orodka [2].
Fig. 4. The acoustic wave and its length by the frequency is so maa that are not syszalne call infradwikami (lower than 16 Hz), for ktrych toastess warming tray frequency is so great, er