Room acoustic design
Optimum values definition we wish to get

The optimum values of the standard acoustic parameters are obtained by the acoustic criteria that are required for constructions.

Design steps

The size and dimensions of the construction are computed by an analytical method called ACUSTIC_SALAS. The calculations are done from the planes, sketches or ideas in order to achieve the best acoustics and aesthetic constructions. ACUSTIC_SALAS is compatible with other calculus applications and 3D design programs.

The process is divided in 3 different steps:

  1. Establishing the acoustic criteria of every construction depending on their use.
  2. Studying of the dimensions of the construction in order to achieve the best use of it.
  3. Defining shapes, inclinations and materials in order to achieve the best acoustics.


Room simulation
  1. Pulse Reply: echo and reflection analysis.
  2. Reverberation Time (RT) in octave bands.
  3. Early Decay Time (EDT) in octave bands.
  4. Brightness and level in octave bands.
  5. Definition index (D50) in octave bands.
  6. Clarity Index (C80) in octave bands.
  7. Total loudness level G
  8. Intelligibility index (STI O RASTI).
  9. The ESTUDI ACUSTIC check every result obtained with recent computer programs.


Every calculation of the acoustic parameter is checked for a valid result.



Ámbitos de aplicación

Halls, Operas, Theatres, Chamber Music, Conference Spaces, Lecture Rooms, Polyvalent Rooms, Conservatories or Music Schools, Exhibition and Arena Spaces, Sound-Recording Studios, Broadcasting Studios, Sports Halls, etc...


Sound insulation and sound control in civil and industrial construction

Sound insulation of horizontal and vertical divisions: Sound insulation study of the construction, façade walls and, specially, the engine rooms.

The walls and ceiling are calculated and defined for the whole construction and for every room in order to achieve and excellent sound insulation. The sound insulation is carried out according to local, state or federal requirements, construction criteria and NC (Noise Criteria). The acoustic comfort is defined and numerical values are established for the maximum level of sound and vibratory immision allowable.



Sound insulation of rooms

Ventilation and air conditioning systems are checked in order to not overcome noise level considered annoying.

Furthermore, in this regard installations guidelines and performance estimates will be supplied and provided to reduce the noise output. The following measurements will be done: Noise and vibration insulation of ventilation and air conditioning systems.

First of all constructive criteria for ventilation and air conditioning systems are defined. Then the construction is acoustically supervised in order to avoid noise and vibrational annoyance. ASHREA Standards and traditional acoustic calculations are used to avoid such annoyances.

SSilencers and noise attenuators that may be necessary will be design in our Studio. They may be used in the air ducts (the sound will be travelled to the ducts). The noise due to the ducts and engines will be calculate.



Application

Places of entertainment: Halls, Operas, Theatres, Chamber Music, Conference Spaces, Lecture Rooms, Polyvalent Rooms, Conservatories or Music Schools, Exhibition and Arena Spaces, Sound-Recording Studios, Broadcasting Studios. Ludic Places: Clubs, Sport Halls. Industrial Places: Factories, airports, railway networks, etc.


Control of environmental
Goals

The impact on the environment can be evaluated. The survey includes:

  1. Study and delimitation of acoustic impact.
  2. Localization of possible affected receptors.
  3. Resulting noise levels are compared to local, state or federal requirements. Therefore, a complete guidance is supplied in order to abate possible noise nuisance.

Initial acústico analysis

In-situ measurements are carried out in representative noise sources in order to establish a previous diagnosis according to local, state or federal requirements.

Corrective measures - Noise control

Corrective measures will be carried out in order to abate environmental and industrial noise in the locations under analysis.

Computer Simulation

Once the corrective measures were applied, an acoustic survey is done using computer simulation programs. The survey is done before and after the corrective measures application. Then, the noise abatement can be checked. The dBROAD computer simulator is used is used for the calculations of urban and road networks noise.



Application

rban and road networks surveys, industrial and civil installations, etc.


Acoustic Measurements
Constructions and engine noise analysis and in.situ acoustic insulation analysis:

  1. Analysis of noise and vibrations

    Measurements of noise and vibrations are done in different noise and vibrational sources, in the most contaminated places of a construction or in places near to a entertainment or industrial place. The local, state or federal requirements must be carried out.

  2. In-situ sound insulation test

    NBE-88 (basic standard for acoustic conditions) or quality specifications for industry must be carried out.

    • Sound insulation of constructions.
    • Aislamiento acústico de paredes divisorias entre recintos.

    Sound insulation of boundaries.

  3. Nota: These measurements are carried out in 1:1 octave bands and dB A according to UNE EN 74 043-87.



    Analysis of the quality of megaphones system

    The aims of these tests are to determine the acoustic quality of the electroacustical proposal

    The acoustic measurements are carried out according to ISO3382, but running the loudspeaker system in order to check it.

      The magnitudes that will be measured are:
    • Pulse reply: Acoustic reflection analysis.
    • Sound coverage in the construction.
    • Intelligibility index (STI o RASTI).
    • Frequency response.

    Places of entertainment: Halls, Operas, Theatres, Chamber Music, Conference Spaces, Lecture Rooms, Polyvalent Rooms, Conservatories or Music Schools, Exhibition and Arena Spaces, Sound-Recording Studios, Broadcasting Studios. Ludic Places: Clubs, Sport Halls. Industrial Places: Factories, airports, railway networks, etc.



    Acoustic quality analysis of a room

    The aims of these test are to measure the acoustic quality of a room in relation to the acoustic specifications. Moreover, the analysis allows to contrast with previous acoustic conditioning and solve any problem in case of anomalies.

    Analysis of acoustic characterization of a hall (test in-situ):

    The acoustic parameters to be determined for an acoustic diagnosis are shown in the analysis. A diagnosis of the room characterisation depending on the acoustic parameters are also done. The acoustic parameters guarantee a proper room acoustics.The acoustic measurements are carried out according to ISO3382, but using pseudo-random sequences or similar.

    The necessary acoustic parameters to determine the proper room acoustic are:

    • Pulse Reply: Echo and reflection analysis.
    • Reverberation Time (RT) in octave bands.
    • Early Decay Time (EDT) in octave bands
    • Brightness and warmth level in octave bands
    • Definition index (D50) in octave bands
    • Clarity Index (C80) in octave bands
    • Total loudness level G
    • Intelligibility index (STI O RASTI)

Sonorización de recintos
DEFINITION

The aims of the electroacoustic consultation is trying to define the microphones, loudspeaker and amplification systems, speech and simultaneous translations, intercommunications, notices, projections and videoconferences, equipment of audio/video control rooms and general megaphones.

Definition of canalisation, cabling and electric boards: Once every audiovisual sub-system is defined, the canalisations, cabling and electric installations are detailed.

Estimate and report of measurements: A report of measures and a estimate are done. The report of measurements is divided in sub-systems. The estimate includes all the expenses due to the equipement, the canalisations, the cabling, the electric installations and the starting.

SIMULATION CALCULATIONS:

The aim is to study the best location and orientation for the loudspeakers using computer simulations in each room. This study is done taking into account the acoustics and aesthetic, architectural, mechanical and functional criteria.

The virtual model of the proposed construction is done by the computer program and it is transferred to the electrostatic simulation program to analyse the loudspeaker system. A wide range of standardized parameters are analyse in order to study in detail the response of these loudspeaker systems. Some parameters are shown as follows:

  • Pulse Reply
  • Intelligibility Index
  • Frequency Response
  • Sound Coverage
Applications

Places of entertainment: Halls, Operas, Theatres, Chamber Music, Conference Spaces, Lecture Rooms, Polyvalent Rooms, Conservatories or Music Schools, Exhibition and Arena Spaces, Sound-Recording Studios, Broadcasting Studios. Ludic Places: Clubs, Sport Halls. Industrial Places: Factories, airports, etc.