Variable Acoustics and Acoustic Enhancement system

Variable acoustics refers to the ability to modify the acoustic characteristics of a space, such as reverberation time, sound diffusion, sound absorption and sound envelopment, in order to adapt the acoustic environment to specific needs or preferences. This can be achieved through the use of adjustable materials, movable panels, or advanced audio technologies, allowing for versatile control over the sound quality and ambiance within a given space.

Step into the realm of SIAP, where our cutting-edge variable acoustic system (also called acoustic enhancement system (AES) – adaptive acoustic systems (AAS) or virtual acoustic systems (VAS)) redefine the music experience within any venue. SIAP effortlessly transforms single-purpose spaces into versatile venues suitable for a wide range of performances, whether amplified or unamplified. From grand theaters and concert halls to serene churches and opera houses, we excel in tailoring acoustic environments to suit diverse artistic expressions.

Different music genres demand distinct acoustical settings, and each venue is designed with a specific purpose in mind. However, with SIAP applications, the potential for acoustic adaptability becomes limitless. Our user-friendly system can be effortlessly operated via an iPad, granting you the power to expand your venue’s capabilities and create truly unique experiences. Your theater can seamlessly become a concert hall or host an opera performance – the possibilities are boundless with the SIAP system.SIAP Acoustic System Overview

Our system stands out because it generates reverberation using a processor that mimics the sound reflections found in real concert halls and opera theaters. This results in a fully natural reverberation, in stark contrast to artificial reverberation processors or acoustic feedback-based systems, which often sound artificial or overly amplified. This unique approach has earned SIAP worldwide patents.

To ensure the utmost quality and experience for our clients, we employ the highest-quality components available. All equipment and components used in our system, including amplifiers, loudspeakers, microphones, ADDA converters, and pre-amps, undergo rigorous certification to meet our stringent quality and performance standards. Additionally, we provide a standard 1-year warranty and offer the option to establish preventive maintenance agreements after the first year. At SIAP, service excellence is paramount, and we provide annual maintenance and system checks to guarantee optimal operation.

What truly sets SIAP apart is that our system has been developed and fine-tuned by acousticians and musicians who possess an unparalleled passion for exceptional music. With over 70 installations across the globe, SIAP Acoustics is a renowned leader in variable acoustics, hall acoustics, electroacoustics, and room acoustics. We are always eager to assist and brainstorm possibilities to elevate your venue’s potential!

Discover how our acoustic enhancement system is applied in theaters, churches, and studios.

1. Theatre acoustics

Theaters are typically constructed with a short reverberation time, a crucial factor for clear speech intelligibility and optimal performance of amplified sound. In many cases, venues are intentionally designed to be acoustically “dry” since most performances rely on full amplification. Various elements within a theater contribute to its acoustic characteristics. Elements such as walls and seating are designed to offer ample sound absorption, and non-parallel walls are employed to combat issues like flutter echoes and undesirable reflections. Beyond reverberation time, numerous other acoustic parameters significantly impact the auditory quality and overall sound experience within a theater auditorium.

With the SIAP system, you gain the ability to adapt your theater for diverse purposes, whether transforming it into a concert hall or hosting a captivating ballet performance. The potential applications are boundless with our SIAP system. Reach out to us, and let’s explore how we can optimize the acoustics in your theater, venue or musical (class) room.

The SIAP system elevates hall acoustics for both single-purpose and multipurpose use. For single-purpose enhancement, SIAP can enhance the acoustics for music or enhance the intelligibility of unamplified speech. In the case of multipurpose enhancement, SIAP ensures that a hall’s acoustics can be finely tuned to suit a wide spectrum of purposes, including unamplified and amplified music as well as cinema surround support. For instance, SIAP can improve the acoustics for music by enhancing aspects such as Reverberation Time, sound envelopment, or spatial richness in a hall that lacks sufficient reverberation for classical music. It can also rejuvenate spaces where acoustics are excessively dry, even making amplified performances in genres like pop, jazz, theater, or musicals more vibrant. In situations where audience interaction is lacking, the SIAP system provides added support to create an inviting room ambiance. Regardless of the specific challenge, the SIAP system ensures that your audience enjoys a flawless and immersive experience.

2. Auditorium acoustics

If your venue has an auditorium, you are probably aware of how important acoustics are in an auditorium. Proper acoustics are critical but can be difficult. Poorly designed or acoustically untreated spaces result in unpleasantly long reverb or echoes that interfere with speech intelligibility and musical clarity.

At SIAP we have a lot of experience in optimizing auditorium acoustics. Our SIAP system enhances the acoustics of a hall for a single purpose and/or multipurpose use. Single purpose SIAP acoustic enhancement can for example be improvement of the acoustics for music or intelligibility of unamplified speech. Multipurpose SIAP acoustic enhancement makes the acoustics of a hall optimally adjustable to a wide range of purposes. Whatever the issue, with the SIAP system you will make sure that the audience has the perfect experience and will achieve the best auditorium acoustics.

Improve your acoustics sound, contact us to see what we can do for you!

3. Church acoustics

Churches often boast rich, beautiful acoustics, enhancing musical performances for organs, choirs, vocal harmonies, and speeches. However, this reverberation can pose challenges for speech intelligibility.

Historical and structural changes have altered the acoustics of many churches, affecting the spatiality desired for music. Modern churches, too, often lack sufficient reverberation and spaciousness.

SIAP offers a comprehensive solution, preserving acoustics and speech clarity through adaptive acoustics. This ensures optimal sound for musicians, speakers, and the congregation, creating a meaningful communal experience. Our system delivers high-quality music reproduction, adjustable acoustics, and speech enhancement, seamlessly balancing the contrasting needs of music and speech intelligibility within one installation.

4. Our results

SIAP has consistently achieved outstanding acoustic performance across diverse settings. Be it a theater, concert hall, recording studio, or conference room, SIAP crafts customized solutions for each venue’s precise requirements. The outcomes are self-evident: elevated sound quality, enhanced clarity, and a more enjoyable listening encounter.

Our team of adept professionals collaborates intimately with clients, comprehending their distinctive needs to design solutions that yield remarkable results. By merging cutting-edge technologies with an extensive grasp of acoustics, SIAP crafts immersive, captivating acoustical environments that provide sheer delight to all who engage with them.

Check out our previous projects

5. SIAP commitment

SIAP Acoustics is an industry leader when it comes to delivering high-quality, custom-tailored acoustic solutions. With our focus on innovation, commitment to excellence and love for fine music, we are the ideal partner for your variable acoustics system.


Why should you improve the acoustic for a theatre/church/auditorium?
Enhancing acoustics in theaters, churches, and auditoriums is imperative for several reasons. Firstly, it elevates sound quality, ensuring that music, speech, and performances are heard clearly and with depth, enriching the overall auditory experience. Improved acoustics also bolster speech intelligibility, particularly crucial for venues where speeches, lectures, or sermons are delivered, enabling effective communication with the audience.

Furthermore, optimized acoustics contribute to audience immersion, making the space more versatile and accommodating a broader spectrum of events. This versatility enhances audience satisfaction, fosters artistic expression, and holds cultural or religious significance in spaces like churches. In essence, improving acoustics enhances the overall functionality, artistic potential, and cultural importance of these venues, benefiting both performers and attendees alike.

How to design auditorium acoustics?
Designing proper acoustics for an auditorium involves considering various factors that affect sound quality, including the size and shape of the space, the materials used, and the intended use of the auditorium.

It largely depends on the primary function of the auditorium, which type of performances will be mainly played? For example: music performances, theatrical plays, speeches, or conferences. Each purpose may have specific requirements for sound quality and intelligibility. Based on the main use, a reverberation time, room volume, shape and suitable materials are determined.

What are the key acoustical considerations when designing acoustics in theaters?The acoustics required for a theatre depend on its specific purpose and design. The primary goal in theatre acoustics is to ensure clear and intelligible speech, as well as the ability to project sound from the stage to the audience. Speech intelligibility: The audience should be able to understand dialogue and vocals clearly, regardless of their seating location. Good speech intelligibility is crucial for theatrical performances. Achieving this involves controlling reverberation, minimizing (flutter) echoes, and reducing background noise.

Could you explain the concept of theater acoustics?
Acoustics in a theatre refer to the sound properties and characteristics of the space that impact the quality, clarity, and distribution of sound during performances. The goal of theatre acoustics is to create an environment where the audience can hear and understand dialogue, vocals, music, and other audio elements with optimal intelligibility and immersion.

Subjects that are part of the design are reverberation time, speech intelligibility, early reflections, sound distribution (the acoustics of a theatre should ensure that sound is distributed evenly throughout the seating area, including both the main floor and any balconies or upper levels.

Balanced sound distribution helps create a consistent listening experience for the entire audience, regardless of their location within the theatre.). Then there could be an orchestra pit as well, special attention needs to be given to its acoustics. Last but not least, Noise Control: Adequate noise control is essential in a theatre to minimize unwanted background noise that can distract the audience. This includes addressing external noise sources, such as HVAC systems or nearby traffic, as well as internal noise sources like stage machinery or equipment.

What is the optimal shape for achieving the best (room) acoustics?
There is no universally “best” shape for acoustics, as the optimal shape depends on various factors, including the specific purpose of the space, intended use, and personal preferences. However, certain shapes and design principles are commonly employed to achieve favorable acoustic properties.

Shoebox Shape: The shoebox shape is a classic design for concert halls and performance venues. It features a rectangular or elongated room with a high ceiling and parallel side walls. This shape helps facilitate strong early reflections and encourages sound to travel directly from the stage to the audience, enhancing clarity and envelopment.

Fan Shape: The fan shape is often used in larger auditoriums and lecture halls. The seating area is arranged in a semi-circular or fan-like pattern, with the stage located at the focal point. This design allows for good sightlines and helps distribute sound evenly across the seating area, enhancing the sense of immersion and providing clear sight and sound to the audience.

Vineyard Style: The vineyard style, named after the vineyard-like terraced seating arrangement, is a popular design for opera houses and concert halls. This shape features multiple levels of seating, each slightly elevated to provide better visibility. The staggered seating arrangement helps to diffuse sound reflections and create a more intimate listening experience.

Variable Acoustic Spaces: Some modern venues employ adjustable or variable acoustic systems. These spaces can modify their shape and materials to adapt to different performances or requirements. By changing the shape, surface materials, and other parameters, these venues can optimize the acoustics for different types of events, from symphonies to theatrical performances.