Acoustic calculation selection of sound equipment for a cinema, installation and setup

Professional sound equipment for cinemas

The task of professional and competent sounding for cinemas is especially relevant. Without good, high-quality sound, they simply will not be visited. And what should the sound in the cinema be and how to achieve it?

Sound for which you want to come to the cinema

Sound equipment for the cinema - professionally designed, competently selected and installed by the specialists of our company - guarantees the fulfillment of all the requirements important for sounding cinemas and similar facilities. And this is ensuring:

good, clear audibility in all zones and at each spectator seat;

high-quality, intelligible, clearly distinguishable sound of the entire sound spectrum of the broadcast.

Acoustic systems for the cinema correctly selected by type, purpose, dynamic and frequency range, competently placed allow you to hear well and distinguish all the subtleties of the musical composition, noises and sounds. For example, even the whisper of the characters in the film being broadcast against a loud background (music that builds tension, explosions, thunder, etc.);

absence of any distortion of the sound, incomprehensibility, crackling, noise, volume drops, etc.;

comfortable perception of the sound palette.

Express Sound specialists design the sound system of the cinema hall so that any note and sound shade is audible, but sounds harmonious and soft to the ear even at high volume, and does not deafen or cause other discomfort.

What guarantees professional sound system of the cinema?

Competent design of the sound system in the cinema by our specialists is carried out taking into account:

area of ​​the hall;

features of its architecture and layout;

number of seats and their location;

nature of additional events held in the cinema - concerts, presentations, shows, etc.;

acoustic features of the room;

the quality of sound insulation and the type of materials used in finishing and decorating the cinema hall, etc.

Professional-grade sound equipment from our company – a set of cinema acoustics, amplifiers, subwoofers, behind-the-screen speakers, surround sound, etc. – provides:
high-quality audio accompaniment – ​​powerful, comfortable, voluminous;
impeccable transmission – clean, clear, detailed;
distinguishability of the entire sound spectrum;
creation of a pleasant and realistic three-dimensional sound field;
a comfortable sound environment for each viewer.
We make it so that you don’t want to leave the cinema.

When opening a movie theater, you need to remember that choosing audio equipment is one of the most important stages of building a movie theater. We will tell you what you need to launch a movie theater with good and high-quality sound.
First, you need to analyze the room for its acoustic properties. To do this, you need to invite an acoustics specialist who will measure the reverberation time in the hall using special equipment and examine it for acoustic characteristics. A separate sound reinforcement project is drawn up for each movie theater. The next step will be building a model of the movie theater in the program for acoustic calculation.

In this case, it is desirable to have all the dimensions of the movie theater room, they are necessary for building a 3D model in the EASE 4.3 acoustics calculation program, with the help of which a specialist will be able to select the necessary materials (wall and ceiling decoration) to optimize the reverberation time and arrange the acoustic systems. According to the calculation result, the acoustic properties of the room should be improved, only after that you need to follow all the recommendations for finishing the movie theater and install the sound-absorbing materials recommended by the specialist.

After calculating the sound absorption of the cinema hall, we proceed to the selection of acoustic systems. For this, we also use the same software (EASE 4.3) to calculate the acoustics of the room. In the model that was created to calculate sound absorption, we insert cinema acoustic systems, using various arrangement options, as well as various models of acoustic systems for the cinema hall and achieve uniformity of the audio field in the area of ​​​​the audience, and optimal musical pressure. When the result meets the requirement, for the selected speakers, we select music power amplifiers according to the parameters of the selected acoustic systems.

There is a standard for the placement of speakers for the cinema. There are several groups of acoustic systems:

Behind-the-screen acoustics - installed behind the screen and plays the main role of the cinema music system. The set of the behind-the-screen music system consists of high-frequency components consisting of a driver with a horn, mid-range components are medium music speakers responsible for speech intelligibility and subwoofers that give low-frequency frequencies. The surround system consists of small acoustic systems hung around the perimeter of the auditorium, giving the playback the effect of surroundings and the feeling of being in the center of the event.
The notification system is a broadcast music system for announcements or for an audio signal for evacuating a fire alarm. This system is connected separately from the rest and has priority in the event of danger to visitors.
At the moment, technologies in the field of audio equipment are advancing with the times, there are analog and digital devices on the show equipment market. So there are different types of sound power amplifiers, including analog and digital, the latter can be with remote control, the sound engineer servicing the cinema in which digital amplifiers are installed will be able to connect to them using a computer to change the operating status and monitor the amplifiers.
Continuing the chain of the sound amplification path, we connect the selected amplifiers to the music cinema processor. The processor divides the music signal into several frequency bands: high, medium, low, and also distributes the music signal to the acoustic systems for the behind-the-screen acoustics and loudspeakers around the hall.

There are different types of switching for connecting different types of music equipment, it is divided into the same segments:
- Acoustic for connecting acoustic systems
- Signal for music processing, sound sources and for connecting the amplifier to the mixing console
- Instrumental for connecting musical instruments and microphones
- Multi-cable (multicor) having many turns combined into one thick cable
But now this whole web of wires can be replaced by digital technologies that do not lose the quality of the audio signal. One of the most common technologies for digital transmission of audio signals is Dante. Many manufacturers of audio equipment are introducing their digital technologies, they are also the best for this segment of equipment.
Continuing with the switching section, we move on to the next section - installation of audio equipment and setup. The two sections are closely related because When choosing the type and length of cable, the audio equipment designer must imagine how the main music switching routes will go. This can be agreed with other room engineers, for ease of installation.

The installation of acoustic systems is carried out according to the calculation that was made earlier, observing the coordinates of the suspension or installation points, as well as the angles of inclination and direction of the speakers. The acoustic cable is pulled until the end of finishing works. Installation works also include the connection of all components of the audio path. Of course, during installation there are problems that must be solved promptly, by engineers and installers.

It seems that everything is hanging and connected, but there is no sound! This is fixed by an audio equipment tuner. Music equipment is not so easy to start, for example, to start an audio cinema processor, precise tuning by a professional engineer who knows how to set it up is necessary. Then the audio signal is tuned, the frequencies are optimized for the room for excellent sound.

For advice on the selection of acoustic systems, as well as improving the acoustics of the cinema hall, contact us! Send all materials (dimensions, drawings) and technical specifications to info@soundpro.ae or contact us by phone: +7 (495) 642-50-19

Our proposals for designing a cinema hall:

Acoustic analysis of the room;

Improving the acoustics of the hall;

Development and selection of sound and lighting equipment;

Preparation of an estimate;

Supply of show equipment;

Installation and commissioning.