Acoustic calculation and design.

Acoustic calculation and design of acoustic design of the room.

- construction of a 3D model of the room;

- calculation of reverberation time;

- selection of facing and acoustic materials;

- selection of sound equipment (loudspeakers and amplifiers) and their location

- calculation of sound pressure levels, speech intelligibility and other parameters.

Our company performs acoustic and electro-acoustic calculations in a specialized licensed program EASE 4.4 (Enhanced Acoustic Simulator for Engineers), created by the German company AFMG (Ahnert Feistel Media Group). The specialists of our company who perform acoustic calculations have a certificate confirming the qualifications of our specialists and admission to work from AFMG. To obtain a certificate, our specialists underwent training in the Berlin office of AFMG.

A certificate of acoustic modeling in the EASE program is available on our website, and is also provided in the acoustic calculation report.

What tasks does the acoustic calculation perform?

To create a room that requires improved musical reproduction using sound amplification, construction organizations need to understand how to build the room and what facing materials to use. Also, what sound equipment to choose and how to place this equipment. These issues can be resolved by preliminary acoustic calculation in the EASE program. The report provides the following parameters:

Reverberation time (RT) - depends on the facing materials of the room, for each volume of the room, certain reverberation time values ​​​​should be observed, for this our experts select the necessary material when modeling the hall in the EASE program.

Intelligibility coefficient (STI) - a coefficient dependent on the reverberation time, the volume of the hall, the selected acoustic systems and their location. The coefficient shows how intelligible the speech and musical signal emanating from the acoustic systems will be. There are several criteria for the intelligibility coefficient.

Sound pressure level (Direct SPL) - shows the sound pressure level at each point on the audience map, without taking into account the reflected signal (from structures, walls, etc.). This parameter can be used to judge the volume of the sound system.

Direct and reflected signal level (Total SPL) - when calculating this parameter, the reflected sound signal is added to the direct sound pressure. Calculated only indoors.

Articulation Loss Coefficient - a graphical display of the loss of consonant articulation as a percentage, depends on the speech intelligibility of STI.

Musical clarity coefficient (C80) - determines which format of musical works will be most favorable to human hearing in a given room.

A standard acoustic calculation report is presented above, but we can always provide additional parameters upon customer request.

The work we do during acoustic calculation.

• First of all, we analyze all the data on the object that the customer sent us, these are the drawings of the room: plan and section. It is desirable that the drawings are in AutoCAD format. If necessary, our specialists will visit the site and take measurements.

• The second stage is the creation of a 3D model of the room in the EASE program, taking into account all the dimensions, layout and heights. In this case, the facing materials are taken into account. After the model is built, the seats of the spectators are indicated, where the necessary calculations and coefficients will be shown.

• The next stage is the adjustment of the reverberation time depending on the volume of the room, according to the recommendation, we achieve the necessary values ​​depending on the volume of the room. We adjust the facing materials, and provide our recommendations in the report.

• After editing the characteristics of the room, we place simulators of acoustic systems in the 3D model. In this case, we select the brand and model of acoustics for the required tasks. Also, for each system, we set the direction to the audience with the required angles. We also provide the coordinates of the placed acoustic systems in the report.

• The final stage is the calculation of the sound parameters of the room. Next, we formalize all the steps of the acoustic calculation in the report.