TECHNOLOGY

 

Aurasound Technology – the Sound of the Future

The Aurasound team has been designing and manufacturing high performance speakers for 18 years. We have patented technologies in acoustical and tactile transducer design that enable us to deliver superior sound quality at excellent value.

 

Aurasound has 15 utility patents and 6 design patents in the United States at this time.

4903308: Audio Transducer with Controlled Flexibility Diaphragm

5198624: Audio Transducer with Controlled Flexibility Diaphragm

5230021: Audio Transducer Improvements

5249237: Audio Transducer Improvements

5321762: Voice coil actuator

5446797: Audio Transducer with Etched Voice Coil

5450497: Audio Transducer Improvements

5604815: Single magnet audio transducer and method of  manufacturing

5624155: Electromagnetic transducer (for theatre seats)

5652801: Resonance Damper for Piezoelectric transducer

5727076: Audio Transducer having Piezoelectric device

5736808: Piezoelectric speaker

5786741: Polygon Magnet structure for voice coil  actuator

6396197: Piezoelectric speaker

6636612: Speaker for use in confined spaces

D364162: Design patent - amplifier housing

D364167: Design patent - Speaker motor case

D394063: Design Patent - Pair of speaker enclosures

D396723: Design Patent - Speaker basket

D449828: Design Patent - Tiltable loudspeaker enclosure

D483740: Design Patent - Speaker

 

From among our wide-ranging accomplishments on driver design and development, here are the key advances that establish Aurasound as the premier source for high output, small drivers to set the mark for communications and entertainment audio quality.

 

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NRT - Neo Radial Technology

Our extensive research and development in magnetics and materials sciences enabled us to create NRT – Neo Radial Technology drivers.
With their unique tear-drop shaped motor structure, NRT drivers offer unsurpassed efficiency and performance.

 

 

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What makes NRT technology so special?

NRT delivers large excursion capabilities, increased linearity, greater power handling, lower distortion and greater efficiency.
Simply said – a driver that can handle large amounts of power with minimal power compression.

 

 

For max efficiency, coil length = magnetic gap length. SPL is Max, excursion is minimum, poor bass, distortion high.

 

To allow for some excursion, coil length should be greater than the magnetic gap length. But, coil mass higher, inductance higher. Higher mass= less SPL, higher inductance= less high frequency. Poorer cooling - part of coil away from steel.

 

For max excursion, coil length should be much greater than the magnetic gap length. But, coil mass much higher, inductance much higher. Higher mass= poorest SPL, higher inductance= poorest high frequency. Poorest cooling - large part of coil away from steel.

 

 

For max efficiency, coil length = magnetic gap length. SPL is Max, excursion is minimum, distortion high.

 

For medium excursion, coil length remains the same, but the magnetic gap is longer. Coil mass same, inductance same. SPL same, high frequency response same. Excellent cooling - coil always near steel.

 

For max excursion, coil length remains the same, but the magnetic gap is very long. Coil mass same, inductance same. SPL same, high frequency response same. Excellent cooling - coil always near steel. ALL ADVANTAGES - NO COMPROMISES!

 

 

• Magnetic gap set by magnet length

• Excursion controlled by magnet length

• Coil weight and inductance remain constant

• Coil fully immersed in gap

• Always near magnets or steel parts

• No stray flux

• Intrinsically magnetically shield

• Small and compact design

 

Conventional

• Magnetic gap set to top plate thickness

• Excursion set by coil length, coil weight and inductance varies

• Coil extends out of gap at top and bottom

• Majority of coil not near steel parts

• Stray flux

• Needs shielding or bucking magnet

• Large and bulky design especially with bucking magnet

 

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Here is a cut-away example of NRT technology in a 12” Pro audio quality subwoofer – the Aurasound MR-12.4.

 

 

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The following graphs help show the impact of NRT technology on driver performance and characteristics.

 

vs Conventional Motor

Motor force (BL) vs displacement

 

 

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NRT technology delivers terrific benefits to drivers of all sizes and applications – from powerful Pro audio subwoofers – to esoteric hi- fidelity systems – to miniature drivers for televisions, laptops, mobile phones and more. Here are some examples.

 

 

Aurasound’s innovative Whisper driver is another excellent example of how NRT Technology served to enable a new generation of drivers that raised the benchmarks of what small drivers can accomplish.

 

 

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Our benchmarks for compact, wide-bandwidth A/V transducers

• Good low-frequency extension = high compliance and/or high mass

• Good high-frequency extension = low mass and low inductance

• High output = high excursion

• Low distortion = good magnetic and suspension linearity

• Magnetically shelded

 

Here’s how we accomplished it all:

 

 

 

 

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Technologies like NRT and Whisper drivers have enabled Aurasound to successfully fulfill the needs of an ever-widening range of customers.

 

 

Going forward with these innovations, and the added strengths of our parent company GGEC, Aurasound is able to bring new levels of entertainment and value to the sound performance of laptops, televisions, mobile phones and headphones and earphones.

 

Using our depth of engineering experience with technologies like NRT and Whisper drivers, Aurasound is leading the way to the creation of superior audio in smaller and smaller spaces.

 

 

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Laptop Speakers

Aurasound began work applying these technologies to dedicated laptop speakers in 2005. The challenge was extreme – laptop speakers are small and thin and face a host of technical complications. During development, we identified several key areas for improvement:

 

• Power handling

• Frequency range

• Sensitivity

• Stability

 

The Aurasound team took on these challenges directly and with our patented technologies and engineering experience, we created proprietary and patent-pending designs to improve performance for the category.

 

Aurasoud has engineered great sound for a variety of famous PC brands.

 

 

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Television Speakers

Focusing Aurasound’s unique technologies and long experience to the application of TV sound is a natural. Flat screens are getting thinner and thinner and their video performance is getting better and better, TV audio is faced with a real challenge – as the acoustic space to work with gets smaller, hos is it possible to generate sound quality comparable to the stellar picture quality? Aurasound technology can get the job done.

 

 

 

 

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Mobile Phone Speakers

The mobile lifestyle is now upon us all. The need for clear sound from one’s phone is now a requirement – with music and entertainment joining in on what used to be strictly for voice. Aurasound is designing great sound into mobile phones.

 

 

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The secret behind the superior quality is Aurasound’s Micro Speakers. These Micro Speakers are specially engineered for mobile phone and GPS applications for improved speech intelligibility.

 

 

Whatever the application, Aurasound has applied our technologies and our extensive experience to satisfy customers all over the world.
Please let us know what your needs are, what level of performance you require – and we will be dedicated to your success.

 

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