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One of the leading retail stores in Plovdiv—Billa Trakiya—contacted us with a specific issue related to industrial noise from the air conditioning systems. The store is located on the ground floor of the Tomov Plaza residential complex, and the generated noise was reaching some of the apartments in the building. To ensure the comfort of future residents, Billa decided to take noise reduction measures even before the official move-in.
The store’s air conditioning systems were producing noise that could be heard in the apartments located above the store. Since the concept of the residential complex is focused on the comfort and quality of life of its residents, an effective soundproofing solution was required to ensure a quiet and comfortable environment for them.
The main challenge was the industrial nature of the noise, which had a relatively high intensity and frequency range, causing discomfort to the residents. In addition, the solution had to be implemented within a short timeframe, without disrupting the store’s normal operations.
We developed a two-phase acoustic project, consisting of a conceptual phase and an execution phase. The main approach was to construct a noise-suppressing structure to reduce the sound impact of the air conditioning systems on the apartments.
All necessary materials were delivered from Sofia to Plovdiv within two weeks. The installation of the noise-suppressing structure was completed in just two days, with the process carefully coordinated with the store’s operations to avoid causing any inconvenience to customers or staff.
We measured 70.3 dB(A) at 1 m in front of the window of the nearest bedroom, against a daytime limit of 55 dB(A) under Ordinance No. 6 of 2006. We built a computer noise model (3.5 dB difference from the measured value) and compared two options.
Option 1 was built: roof structures and a noise barrier of perforated metal sandwich panels with mineral wool, acoustic ducts and splitter silencers, with a gap of about 1 m for the air exchange of the machines.
The prediction was 53.7 dB(A). After installation we measured 54 dB(A) in front of the dwellings – a reduction of about 16 dB and below the daytime limit.
Find out more in the video, in which Eng. Aleksandar Kirechev talks about the complete delivery of the project for Billa Trakia, Plovdiv.
Similar project? See our service HVAC and Air Conditioning Systems or contact us via the enquiry form.
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