Resonant mode speakers are wide band-width devices, with very low 3rd-order harmonic distortion.
Conventional speakers use tweeters or compression drivers which are then crossed over to a midrange driver. This crossover is typically within the vocal range, around 800Hz to 1.8kHz, causing lack of intelligibility.
A diffuse sound source is created by exciting a resonant panel, much like a string exciting the body of a guitar. Tectonic does this with exciters and carbon fiber, Nomex honeycomb panels.
The nature of this diffuse source is that it significantly reduces destructive reflections (audible echoes or “slap-back”), thus providing the benefit of clear sound, even in reverberant spaces like gyms, cathedrals, etc...
Resonant mode audio provides a very wide coverage area, compared to conventional pistonic speakers. And they do so at all frequencies, unlike conventional speakers that change coverage patterns with increased frequency.
Also, because the panels exhibit a very sharp impulse response, they provide a very strong image, with compelling stereo or surround sound, even when seated off-center from the speakers.
Resonant mode loudspeakers are designed to resonant at all frequencies in the operating bandwidth, so they are extremely difficult to excite into a feed-back mode in these frequencies.
Open mics can be used in front of Tectonic speakers. However, caution should always be exercised on microphone selection and use, since any system will feedback, including Tectonic Plates in certain applications.
Architects, consultants and sound designers benefit from the low weight, which reduces infrastructure requirements, and the acoustically friendly performance which can reduce or eliminate acoustic treatments.
Flexible and light-weight rigging makes hanging arrays for any coverage quick and easy. The system packs into a few, compact road cases, saving in transport and labor costs.
“... almost like 3-D sound.”
“a humongous sound that was absolutely earth shattering."
“This is the first time where I can really hear so clearly what I play.”
“On a scale of one to ten, how do they sound?” “15.”
Sound in Resonant Mode Audio loudspeakers is created by “exciting” a specially designed panel.
The Tectonic Plates employ a thin carbon fiber-laminated Nomex honeycomb panel. The panel is excited by electro-magnetic motors. Collectively, this device, or transducer, is called a DML (distributed mode loudspeaker).
Using a method similar to a string exciting and resonating the body of an acoustic instrument - like a guitar or violin - the DML produces a predominantly diffuse sound source, versus a point source in conventional pistonic speakers. This provides the unique benefits described above.
One key behavior is that a diffuse sound source is analogous to a room diffusor (specialized room treatment), which is designed to scatter acoustic reflections. A diffuse source reduces focused reflected sounds, which increases intelligibility.
Traditional loudspeakers use uniform pistonic motion to create sound.
The goal of piston design is to not “break up” or resonate. This is exactly the opposite goal of a DML, which is designed to resonate equally at all frequencies in its bandwidth. This fundamental difference solves perennial problems with pistonic designs including: