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The paper is devoted to the presentation of a new methodological approach (new philosophy) to the formulation and solution of directed search and synthesis of electromechanical objects for a given function problems. The object under the study is a class of electrical machines and electromechanical devices which operation is carried out with a variable structure or geometry of the active zone. The research is relevant due to the characteristic trend in the evolution of modern technology which is associated with the creation of complex technical systems with the ability to change the structure and spatial geometry of the executive body in accordance with changing of external factors. The novelty of the synthesis methodology is determined by genetic nature of the technical evolution of electromechanical objects and by genetic programs of structure formation using. According to the results of research the genetic principles and macrogenetic programs of electromechanical objects with variable spatial geometry of active parts have been determined for the very first time. The area of existence and results of genetic synthesis of "elastic" electromechanics objects are presented. The reliability of genetic models, genetic programs and the results of the electromechanical objects with adaptive spatial geometry of the active zone synthesis is confirmed by the results of evolutionary experiments.

The systemicity of hybridization phenomenon is analyzed. This study summarizes the mechanisms of manifestation and forms of submission of the hybridization law, which determines the principles and boundaries of structure formation, taxonomy, methodology of synthesis and analysis of hybrid electromechanical objects at the intraspecies and intergenic levels of their structural organization. The results of the study are important for the further development of the theory of genetic evolution of technical systems.

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The noise problem in hotel rooms is strictly connected to noise generated by heating, ventilating, and air conditioning (HVAC) devices. Hospitality industry companies in many countries have specific requirements and monitor the noise level with technical equipment inside the hotel room. To ensure an adequately low level of noise from the HVAC system, proper calculations and tests are performed before the final application of the system in the hotel room. One of the best methods for assessing the noise level from HVAC devices in hotel rooms is to create a testing room (mock-up) in a certain available space, e.g., in a warehouse, and to perform appropriate standard measurements for the noise level. This method is a popular choice in the hotel industry because the noise level can not only be verified, but also, the installation and operation of the HVAC system inside the room can be checked. The main factors in choosing the space in which the mock-up will be made are availability and appropriate volume. It is not always possible to provide a hall space with a very low background level of noise. This article shows that the selection of a mock-up space is also determined by the noise level in the selected space. The background noise level—thus, the noise level in the mock-up room—must be low enough to be able to reliably measure the noise level from the HVAC equipment to avoid the phenomenon of acoustic masking by other noise sources (background noise) not related to the measurement. Background noise at too high a level will lead to invalidation of the measurement results or overestimation of the actual noise level in the room from the tested HVAC devices. In this study, background noise level measurements made in the testing rooms are described. The results are discussed, and a conclusion is drawn.