Fast vibrations

With a device that constrains the relative slip between layers of plates. The strain accumulated in the structure locally is released as it occurs which results in conversion of a part of the strain energy to the kinetic energy of local, higher frequency vibrations. These higher frequency vibrations are then sunk into heavy damping materials which absorb and convert these to heat.The equilibrium is restored rapidly to allow the structure to return to the initial state by means of a gradual release of the pre-stress accompanied by the frictional dissipation in the contact surfaces. This architecture is used as a Mechanical Crossover to selectively reduce each band of frequencies.The MinusK NSM system absorbs and isolates low frequency vibrations up to 100Hz and the Mechanical Crossover then uses the complete constrained layer plates to absorb mid-band vibrations. Higher frequency artefacts are then focussed and dissipated in the PAR system.From this method we learn the shape and weight of the components influence acoustic behaviour under vibration. Therefore, selection of materials and the suspension elements used determines the crossover frequency and effectiveness!By extending the mechanical crossover concept to the Helix platforms, physical zones can be defined on the infrastructure that focused vibrations away from key areas (platter, bearing, motor, tonearms, floor modes), establishing a smooth continuous pathway to channel vibrations away from critical areas on the turntable.The Helix platforms have been designed to reject low frequency vibrations coming up from the floor by using the MinusK NSM isolation system and drive higher order vibrations generated through motor noise away from the bearing and platter via a complex coupling to the chassis. For these higher order vibrations local isolation, absorbing, redirecting and suppression technologies are employed including semi-active decoupling from motor vibration.Helix turntables have been designed to operate flawlessly in non-ideal environments suffering from floor borne vibrations such as older houses with wooden floors, upper floors, attics and any external vibrations which are carried through buildings – even those made from concrete steel, and brick.Measurement and Visualisation Techniques are used which enable the Dohmann engineering team to ‘see’ these vibrations in real life, especially how they move and where they ‘collect’ on a chassis under real life operating conditions.HTAD (High Torque Adjustable Drive)The precision motor industry is changing rapidly to embracing a software driven architecture. Helix technology is taken from the latest developments in sub-micron servo drive systems for precision optics and adapted by our engineering team to deliver superior motion control to the Helix turntables.The Helix motor control system is a digital closed loop servo with greater than 16bit resolution. Absolute positioning reading occurs over 120,000 discrete positions of the rotor per revolution. The motor spins several hundred times to achieve one revolution of the platter thus increasing the system resolution by an order of magnitude over a direct drive topology.In layman’s terms, this means at 33/45 rpm platter speeds we have an incredibly high number of checks on the speed stability per second. This information is fed to a very fast microprocessor

Faster vibrations are occurring at the same time, which is called overtones or harmonics. On one note, you sing all of these harmonics, but the higher the harmonic, the less it’s heard. Harmonics vibrate at different speeds than the fundamental pitch, and the higher the vibrations, the higher the pitch. The 2nd harmonic will vibrate twice as fast as the fundamental pitch, the 3rd harmonic will vibrate three times as fast as the fundamental pitch, and so on. You can change the harmonics present in the sound by changing the shape of the vocal folds and, therefore, the pitch being created.So how do opera singers modify those techniques to master the human voice? Opera singers can sing loud enough to be heard over the rest of the orchestra and the other singers without a microphone because their higher pitch and resonation add volume to those higher pitches. To sing higher, opera singers vibrate their vocal cords at somewhere between 250-1,500 hertz, a much higher pitch than other singers or the orchestra. Higher-pitched notes are also more distinct to the human ear. They also create more resonance by using a technique called “resonance tuning.” Since opera singers need to be heard more, they sing their first harmonic above its normal value to match the fundamental frequency and, thus, maintain volume and homogeneity of tone. This is often achieved by opening their mouth wide as if smiling or yawning for high notes, which helps the tract act somewhat like a megaphoneThey also

+++++++++Publication n°139HelloI hope you're doing well.Understanding the characteristics of the main sound waves is essential.Especially since they are, in part, the same as the brain waves generated in the different human states of consciousness.By listening to certain playlists and frequencies, you can influence your brain waves and the functions related to them within a few minutes, rebalance certain physical and psychological disorders.They are divided into 7 categories according to the frequency of the waves emitted or their number of oscillations per second in hertz. One herz equals one oscillation per second.The average human brain emits waves of 4 to 45 oscillations per second, although recent research has observed cases with exceptionally slow or ultra-fast waves, in mystics or great meditators.Brain frequencies are related to metaphysical abilities.According to the law of resonance, we know that our heart, all our cells, and all that we harbor in our body of bacteria and micro-organisms (10 times more than human cells) are also equipped with antennae which react to electromagnetic vibrations, which constantly interact as transceivers and align themselves with the waves that surround them.Sometimes independently and unconsciously from the brain above. It has been proven for some years that we have two other "brain" systems, the enteric brain in the microbiota with nearly a hundred million neurons and another in the heart.Corinne Sombrun calls this phenomenon perceptual intelligence: "our conscious thought captures and reacts consciously to a certain amount of information; our body: skin, heart, microbiota, interacts with a million times more information and vibrations , without our being aware of it and our brain, even a thousand times more. "Frédéric Buisson, in his research has shown that we have in our cells a total of billions of dipoles, transmitting and receiving heliocoidal antennae, not to mention those of the trillions of water molecules, and bacteria that we harbor, which also interact permanently with their vibratory environment.Similarly, brain waves enter into resonance, harmonize, balance, in a few seconds, if there is around them a regular repetitive vibro-acoustic rhythm.Sounds with a frequency below 17-20 Hz are perceived as vibrations, and above 20,000 Hz they