This scientific work presents test results of energy efficient lighting systems based on mirrored hollow tubular light guides when sound waves of various intensities of low-frequency, mid-frequency and high-frequency ranges pass through them. Technological changes in design of natural lighting systems, which were carried out in order to increase their vibration resistance and noise absorption, are shown here. Studies have proved high reliability of lighting systems in terms of their soundproofing, especially in mid-frequency and high-frequency ranges, which can significantly reduce harmful effects of noise on human body. 1. Garai М., Guidorzi Р. Sound reflection measurements on noise barriers in critical conditions // Building and Environment, 2015, Vol. 94, December, pp. 752–763. URL: https://doi.org/10.1016/j.buildenv.2015.06.023 (date of application: 19.06.2020).
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• lighting systems
• hollow mirrored tubular light guides (HMTLGs)
• passing sound through an obstacle
• sound insulation properties of materials