Roaming in acoustic depths
Without deep sounds, our favourite music and movies would become unenjoyable. But as our adage “one can have too much of a good thing” expresses it well, too many deep voices can degrade the sound experience. Not only is it important to create an optimal acoustic sound in the studios, it can also be decisive in our homes whether the given room resonates or the appropriate sound-absorbing surfaces muffle the sound, thus ensuring the full enjoyment of music or film. It is not enough to just buy speakers. The ancient Mayan people, who lived 6,000 years ago, also recognized the importance of acoustics in building their temples. Today, we have many excellent products available to maximize the quality of surround sound.
What is acoustics?
From the point of view of surround sound, the acoustics is nothing more than the air space in the room, and the walls, furnishings, etc. fertilized effect.
“Music is a must because it surrounds you”
Music has been used for therapeutic purposes since the 1970s as it relieves stress, and its effects on health have been widely demonstrated. It also follows that sounds created due to poor acoustics can make the listener tense, even causing headaches. Acoustically important factors are intelligibility, resonant sounds, the experience of space, but the proportions of the spaces, the shape of the furnishings and the post-vibration time of the sounds cannot be neglected either.
A perfect floor plan doesn’t exist, but there are definitely unfavorable ones, such as square rooms, where the proportion of walls can be a problem for small spaces. Standing waves, interference points can form, which are disturbing mainly at deep frequencies. Electronic sound system can only slightly improve a room with poor acoustics.
Riding on sound waves
Sound waves bounce off walls, so sound waves of different directions and strengths flow through each point of the room, creating two types of sound fields: diffuse and direct sound fields. The direct sound field is formed when the sound source is switched on, and then the sound is reflected from the walls and objects; this creates the reflected sound field. Together, the two sound fields result in our sense of distance, direction, and space. If, on the other hand, the post-vibration time of the sound is long, it obscures the sound later emitted, thus impairing the intelligibility of the music and speech as well. By absorbing sound, we can reduce this reverberation time, in fact by reducing sound energy.
Well, then let’s swallow a big one!
Sound-absorbing materials are classified according to the efficiency of the energy they absorb, between zero and a value. Zero-rated materials (eg marble) reflect virtually all energy, and the degree of absorption marked with one does not reflect any energy.
A little geometry…
If the space is cubic or rectangular and large, empty, hard surfaces are available, the adverse acoustic effects must be compensated for by sound-absorbing means which reduce the reflected sounds and distribute them evenly.
Anything can help!
The wavelength of deep tones is greater than that of high tones. It can only be dampened with a dense fibrous, high specific gravity acoustic absorbent material or an acoustically tuned membrane. Building materials generally have a low sound absorption capacity. That is why it is important that if we strive for impeccable surround sound, we choose only the best materials and products! Acoustic measurement can be used to calculate the bass absorption capacity with mathematical accuracy.
Come hunt! Let’s trap the bass!
A bass trap or bass-absorbing membrane is essential for a clearer sound. By applying it, we can realize the most important and at the same time the most challenging task of ideal acoustics: the attenuation of deep sounds. In the case of bass (150 Hz), the reverberation time increases, which in practice means that we do not hear the real volume and quality of bass in the room, but the sound of the “room”, and thus distorted bass can ruin the sound experience.
Energy is not lost, it is only transformed
A bass-absorbing membrane is an acoustic panel that reduces excessive sound waves within a narrower frequency range. They provide a clearer, more even sound. The absorbed sound does not disappear, it only transforms. Acoustic coatings are usually made of higher density materials, e.g. made of compressed glass fibers. Due to the energy from the sound, the particles pulsate, releasing the excess energy, but no longer in the form of sound. Air particles rub against the material, causing friction to occur. The kinetic energy of air is converted into heat.
Turn the corner
First in the corners and then on the side walls, the deep sounds accumulating there must be attenuated. If possible, place bass-absorbing membranes at a minimum distance of 10 cm from the wall. Consider the ceiling as well, as on this large, flat surface, standing waves can propagate without hindrance, thus adversely affecting the bass ranges.
Look at the sky!
The natural acoustics of high ceilings can cause problems, which can be solved, for example, by placing suspended ceilings and / or sound-absorbing membranes.
Is it size mate?
A smaller room is much noisier than a spacious, more open-plan room because it reflects sounds faster and picks up the frequency of the room.
This imitation leather membrane is good leather! But that cotton is a good one!
Our deep sound-absorbing membranes, made with unique technology, currently boast the highest absorption (sound-absorbing) coefficient on the market. Thanks to the use of premium quality materials and a high level of professionalism, our leather acoustic membranes perfectly fulfill their bass-absorbing function, while also serving as a decorative accessory for the equipment of our studio and home. High-density acoustic imitation leather above 600 Hertz absorbs very minimal amounts of treble, making it much more effective in the deeper ranges.
Our imitation leather diaphragms destroy unwanted bass sounds as early as 30 Hz, so we’ll hear more detailed bass and the treble will remain more airy. The efficiency of our artificial leather membranes is supported by the 90 kg / cubic meter acoustic cotton embedded in the rigid wooden structure. Acoustic cotton is completely harmless to health. Soft, light, soft-textured sponges, styrofoam, acoustic foams tend to absorb higher tones, hence the deep tones we originally wanted to attenuate; they intensify even more. The fibrous structure of acoustic cotton is the secret of flawless sound absorption and sound insulation.
It is as tough as old shoe leather!
Our imitation leather acoustic membranes are available in seven colours, their feel and appearance are exactly the same as your real leather. Black is available in stock. Cleaning it is very easy. It is sufficient to wipe with a damp cloth.
Let’s see world-acoustic curiosities about the world’s most famous music venues
Sydney Opera House
The architectural style of the Sydney Opera House makes it truly unique. Opinions are divided on the acoustics of the Concert Hall. Critics blame the over-loud sound and the gigantic dimensions for the resulting noise. The renovation of the Opera House is planned for 2019-2021, the hall may undergo a significant transformation. Reducing the size of the stage, replacing outdated acoustic reflectors, and changing the walls can also help create a more perfect surround sound.
Mozart’s legacy: Musikverein
Wolfgang Amadeus Mozart died in 1791, but his musical work, genius and wonderful works have survived for posterity. It opened in 1870 at the Musikverein in Vienna, which is considered to be the best acoustic concert hall in the world. The secret of the excellent acoustics of the Great Hall (Sterling Hall) lies in the design of the hall. Rectangular, flat or slightly sloping floor, high stage and band. There are also a number of sound-reflecting surfaces here. If it is not possible to place sound reflectors in our home, place the speakers at least one meter away from the wall in order to prevent the sound from being absorbed by the materials covering the wall (eg drywall).
It is worth mentioning Symphony Hall, which ranks second in the list of the best concert halls in the world, as well as the bronze-medal Buenos Aires Theater.
The Royal Albert Hall in London
Although most composers generally do not like large-scale on-site acoustics, but because the audience sees more this way, they accept it. Since its 150th anniversary, the Royal Albert Hall has hosted a number of high-quality, world-famous performances and concerts.
Our national pride
The Müpa (Palace of Arts) building houses the four-level National Concert Hall, which can accommodate 1,800 people. Its acoustics are world-class, and its dimensions are impressive: 25 meters wide and 52 meters long. The acoustics were designed by the world-renowned American acoustic design company Artec and its head, Russel Johnson. An important part of the acoustics is the huge sounding parachute above the podium and the auditorium, whose movable wings can be raised and lowered. It weighs 70 tons and the structure consists of 5 movable parts. Along the podium and the side walls, there is a system of resonant chambers that adjust the after-vibration time by moving large doors with computer control.
On a scientific basis
Anatoly Vasilyev, the world-famous Russian director, has asked an academic professor to design the acoustics of his theater in Moscow. This genius scientist was involved in, among other things, space exploration. Examining the mental state he experiences in an enclosed space, he found that a variety of acoustic stimuli can help with the negative effects caused by an enclosed space. A common problem is overcrowding in public spaces, resulting in a confusing sound effect.
In an empty room, between the parallel walls, the sound echoes back and forth, slowly losing its energy. These can be avoided by covering the opposite walls in different ways.
The larger a room, the fewer fixtures in it — the more disturbing the reverberation. Bass-absorbing membranes can help in this case.
They form in the corner and near the walls. By placing bass traps, we can also eliminate this problem.
4.ROOM’S OWN SOUND
The room’s own sound depends on the distance between the walls and the floor and ceiling. It’s a resonance, actually. If the height and width of the room are the same, the self-voice will increase even more.
THIS IS REALLY ACOUSTIC!
It is indisputable that in order to achieve optimal acoustics, we need to consider several factors. The dimensions and shape of the space, the equipment, the covering of the walls, the temperature are all important data! Also, be sure to entrust a real expert with the acoustic examination and precise measurement of your home, office or studio!
Choose premium quality speakers, sound-absorbing and sound-insulating panels, acoustic diffusers, sound-insulating curtains instead of cheaper, poor-quality products! Aesthetics were also taken into account when designing our products. So not only do we pamper our ears, we can also have a visual experience. Any type of our acoustic membranes can become the adornment of any room or studio. Perfect Acoustic not only brings “perfect sound” on its behalf, it is also guided in the production of its products by the goal that its customers are maximally satisfied, they can enjoy flawless sound.