Open AccessON THE TECHNIQUE OF MISMATCHING THE RESONANT INTERACTIONS OF THE SOUND FIELDS CAUSED BY TECHNICAL OBJECTS WITH THEIR OWN ACOUSTIC MODES IN THE AIR VOLUME OF ROOMS
Author(s) -
М. И. Фесина,
Igor Deryabin,
Gorina Larisa
Publication year - 2019
Publication title -
akustika
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.162
H-Index - 7
eISSN - 2570-8775
pISSN - 1801-9064
DOI - 10.36336/akustika20193224
Subject(s) - acoustics , sound power , sound intensity , acoustic attenuation , resonator , sound (geography) , physics , engineering , electrical engineering , optics , attenuation
Noise generating production equipment, which is located in technical rooms, first of all, is represented as power systems (pump and compressor stations, internal combustion engines, diesel-generator units, power electric transformers and electric engines, ventilation systems and air conditioning systems). As a rule, these systems operate on nominal permanent speed operation conditions ns. In their wideband sound radiation spectrum, there are found dominant discrete components which are concentrated in audio spectrum fms = 50…500 Hz, and which are characterized by corresponding sound wavelengths λms. Also, acoustic and temperature eigen fields are appeared in described volumetric air cavity of a technical room, and characterized by acoustic eigenmodes on acoustic vibration frequencies fmА and by sound wavelength λmА. Offered technical methods let eliminate the development of intensive air cavity resonance of sound radiations with proximate values of acoustic vibration frequencies fms and fmА, and sound wavelengths λms and λmА.