Acoustic calculation

What is acoustic calculation?

Calculation stages

After receiving all the initial data regarding the sources of noise and its specifics, special measures or tools are developed to solve the problem of excessive noise and design the property based on general requirements. To prepare a design, it is necessary to strictly follow the list of activities corresponding to the following stages:

• data collection (detection of sound sources, their nature, specifics and characteristics);

• analysis of the key parameters of the building (its shape, the level of the echo or the likelihood of its occurrence, the presence of errors in the construction technology or weakened structures);

• selection of interior items and furniture that perform a sound-absorbing function;

• direct acoustic calculation (selection of calculation points based on the area of the building, its purpose; summation of all sources by level and specificity of sound);

• comparison of the obtained data with current sanitary standards;

• creation of a project to improve sound insulation and sound permeability.

• Most of the stages take place in a computer program, but the final result and effectiveness of all measures aimed at reducing sound vibrations and noise insulation depend on the initial stage (collection and analysis of initial data).

How is acoustic design implemented?

Key indicators that must be present

When applying for documentation regarding the noise parameters of a particular room, the client must understand what exactly he will get as a result. There are certain characteristics that must be calculated in all circumstances, namely:

• sound insulation of the main elements of the structure (walls, partitions, ceilings, ventilation systems or air conditioning);
• sound absorption intensity (furniture and its material, the presence of additional doors or windows, ventilation ducts, soft decor and textiles, curtains);
• external and internal vibration insulation of the building, as well as technical equipment.

At the initial stage, all mandatory measurements are taken, because later it will no longer be possible to make any changes to the interior or the layout of the facility. According to the approved standards of DBN and GOST, a number of buildings and structures require the issuance of a special passport. The list includes high-rise buildings and residential complexes, sanatoriums and hotels, schools and universities, sports and assembly halls, offices and shopping centers, nightclubs and theaters, as well as many other objects.


A specialist such as an acoustic engineer is responsible for the work. He takes all the necessary measurements, and then models the room on a computer and generates a calculation.

Input parameters for calculation
For a comfortable stay in a building, it is necessary to achieve noise levels at the level of perception of octave frequency bands: 125 Hz, 500 Hz and 2000 Hz. The level of constant noise is calculated based on ultrasonic sound and ultrasonic sound waves, which have threshold values: ultrasonic sound - 2·10 N/m, ultrasonic sound level - 10 W, and the perimeter of oscillation of sound waves is also taken into account. SPL and USM are determined according to established formulas, using correction factors. The following points are taken into account as input parameters:

• drawings and layout;
• layout diagrams;
• maximum sound level;
• equivalent continuous sound level;
• parameters of bends, air ducts, control valves and other key points;
• air circulation speed;
• air circulation speed;
• noise characteristics of installed machines or external noise sources;
• wall thickness, their material, the presence of additional sound insulation elements on windows, doors, external or internal insulation;
• the location of the object on the city map and its proximity to direct sources of hum.

Special soundproofing materials for interior and exterior decoration
Sound insulation is a serious problem, and if it is necessary to achieve high quality acoustics, then the choice of facing material must be approached with special attention. In most cases, the need for increased noise insulation in residential buildings arises when the construction technology is violated or the walls are too thin. If we are talking about sports or dance halls, cinemas or shopping centers, then the reasons for the noise are completely different. The most popular and affordable facing materials are:

• foam rubber, which corrects high and medium frequencies and reduces reverberation;
• panels used to control sound vibrations and reverberation;
• macsound, which help absorb and reduce noise;
• ceilings that remove excess noise coming from above the room or building.

Upon completion of the work, the customer company receives an acoustic passport, which reflects current data on the level of noise insulation, sound insulation and reverberation.

Our offer

For more than ten years, we have been offering acoustic design services on the market for objects of various levels of complexity. Our guarantees are vast experience in solving difficult problems, a powerful technical and material base, and excellent specialists.

By ordering a service from us, you will receive not only a reliable calculation, but also all accompanying documents. The use of modern technologies and computer programs allows us to speed up the process of preparing the necessary recommendations.struction company can carry out a correct acoustic calculation, since knowledge only in the field of industrial and civil engineering is not enough for this. If the noise level causes discomfort and distorts sounds, then you cannot do without a special calculation performed by professionals.