Research and innovation
Acoustic panels are sound-absorbing panels which, correctly positioned inside a room, control and reduce environmental noise and reverberation. Originally required only for professional environments such as recording studios and theaters, today they have become increasingly indispensable objects in environments such as offices, restaurants, libraries, airport lounges and hotels.
Arcadia offers a panel that also adapts to spaces where design is a necessity.
Quilted motif of the Arcadia panel boasts a double effect: on the aesthetic side, thanks to the elegant lines that recall the capitonné work, on the other functional; conical cavities on the surface improve the acoustic absorption performance of the panel: vibrations are in fact captured to a greater extent and the sound released more slowly.
Know the Sound
Each sound originates from a vibration: an object that vibrates causes a disturbance of the air molecules that surround it, which in turn push against other molecules, so that the perturbation created by the vibration expands in all directions.
Frequency of sound is the number of times sound waves vibrate in one second.
Human ear can only hear sounds with frequencies between 20 and 20,000 vibrations per second. Change in variation of audible frequencies, however, varies from person to person and according to age. Frequencies below or above the human threshold are called infrasound or ultrasound respectively.
Human ear cannot distinguish two sounds if they are perceived less than 0.1 seconds apart. Speed of sound in the air at 20 ° C is approximately 340 m / s.
Sound absorption / Soundproofing
Let’s specify immediately a fundamental concept: sound absorbing and soundproofing are not synonymous. Sound-absorbing panels are not soundproofing. While sound-absorbing panels are usually indipendent, the structure of a building is usually soundproofing, to ensure that the sounds do not spread from one side of the wall to the other.
• A material is defined as sound-absorbing when its main feature is transforming a good part of the acoustic energy passing through the material itself, into another type of energy. Sound-absorbing materials are usually made with shapes that allow them to reflect the acoustic energy they receive as little as possible.
• A material is defined as soundproofing if its fundamental feature is to reflect the acoustic energy it receives. To a first approximation the level of insulation of a material or a wall depends mainly on its mass per square meter (e.g. lead and cement are great soundproofing material).
Sound-absorbing panels do not acoustically isolate an environment, but they absorb the sound.
• By acoustic treatment we mean all those interventions aimed at controlling and improving the acoustics of a room. Acoustic treatment is also necessary in cases where an acoustic comfort increase is needed e.g. restaurants, schools and public places. Main objectives of the acoustic treatment are to control the resonance of a room, limit the reverberation time and all the acoustic problems of closed environments.
• With sound-absorbing panels, the volume of sound inside is reduced, consequently the volume that passes to neighboring rooms is slightly reduced, but it is not the final use.
Reverberation is an acoustic phenomenon linked to the reflection of the sound wave by an obstacle placed in front of the sound source itself. Reverberation has negative aspects, such as the risk of masking the syllables of speech.
If the sound source and the listener are in the same spot in front of the obstacle, given the premises above, in an open space we can speak of reverberation when the obstacle is less than 17 meters from the sound source. In fact, up to this distance, the path of sound waves from the source to the obstacle and return is less than 34 meters and therefore the sound takes less than 1/10 of a second to return to the starting point blending into the ear of the listener with the original sound.
If the obstacle is more than 17 meters away from the source, then the delay of the reflected sound with respect to the direct sound is greater than 1/10 of a second and the two sounds are therefore distinct. In this case we talk about echo.
Reverberation depends on the size of the environment and the type of walls hit by the sound.
Different materials have different absorption coefficients.