ENGINEERING TOOLS AND SUPPORT

 

Aurasound has a dedicated and experienced R&D staff at your disposal. Our Staff is experienced in the design of Consumer product, Multimedia, and Telecommunications. We also have a dedicated Professional Audio Staff. At Aurasound we also have industrial Design capabilities in the USA at your disposal to help you get the “WOW” factor your product needs to succeed.

 

Below is a brief list of the engineering resources and resources available to make your product requirements a reality. With this level of support from the R&D team at Aurasound, and the staff in our offices around the world – Aurasound can free up your internal resources, so you can multiply your product offerings in your product plans, year after year.

 

 

Aurasound has a direct development staff of more than 30 people including:

5 acoustic engineers and 2 mechanical engineers at our Guangzhou office, 2 acoustic engineers at our Taiwan facility, and 2 more acoustics engineers in our US offices. Wherever needed, Aurasound also has the immediate support of our parent companies deep engineering resources in electronics, plastic design, production and molding.

 

We are also skilled in product definition and would be pleased to help with product definition, and assist you in meeting your cost targets, product performance benchmarks and help you achieve your sales goals.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The resources we have available to you during the design phase, added to our manpower, can be a great advantage in helping you meet your time-to-market objectives. Our electrical engineering staff is fully capable of designing amplified products to meet your requirements. And our CAD/CAM department can provide any necessary prototypes, SLA models, etc. quickly and efficiently.

 

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Aurasound USA R&D Software and Equipment

MLSSA Systems

LMS Analyzer

Klippel Non-linear Analyzer

Listen SoundCheck Analyzer

Audio Precision Analyzer

Maxwell FEA analysis

ANSYS

 

 

 

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Mechanical Design Software

Auto CAD

Solidworks

Pro E

 

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Measurement Facilities

Fully suspended Anechoic Chamber

Ground-Plane Measurement facility

 

Klippel Measurement system

The Klippel Company is an innovative German company founded by Prof. Wolfgang Klippel in 1997 to produce novel control and measurement systems for loudspeakers. The current developments are based on the results of loudspeaker research performed over nearly 20 years and published in numerous scientific papers and patents. We use this system in our design work for driver development.

 

 

 

 

 

 

 

 

 

 

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Coping with Driver Nonlinearities

The large signal parameters give direct indications about the physical cause of the distortion. Some of these problems can be inexpensively fixed by improving the voice coil position and the suspension assembly. Other nonlinearities are directly related to other desired properties of the speaker such as efficiency and size. To find the optimal solution for the particular application the engineer uses simulation tools to predict the final performance in the large signal domain. We have these tools in our R&D department to help you achieve the optimum technical performance of your driver designs.

 

 

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Linear X (LMS)

 

APPLICATION GRAPH 1: SLP RESPONSE

This is the normal full sweep Sound Pressure Level frequency response. Since LMS measures automatically in absolute dBSPL, no level scaling or determination of absolute levels is required. You can measure the sensitivity of any transducer directly by simply setting the drive level from the power amp to 1 watt. The curves below show a woofer in Yellow, a midrange in Red, and a tweeter in Blue.

 

 

 

 

 

 

 

 

 

APPLICATION GRAPH 2: IMPEDANCE RESPONSE

With LMS, taking accurate impedance measurements is as easy as connecting two wires to a speaker. LMS uses a built-in 500 Ohm output resistance to form a voltage divider with the load. LMS then automatically resolves this equation and produces the actual impedance of the load in true Ohms. For more accuracy and capability the VI-Box can be used. This will allow impedance measurements at any power level.

 

 

 

 

 

 

 

 

 

APPLICATION GRAPH 3: TIME DOMAIN RESPONSE

By using one of the processing features, LMS can perform an inverse FFT on any frequency domain data, and produce a time domain response. Both Impulse and Step response curves are generated. LMS has many powerful post processing functions which allow easy manipulation of curve data. The step response is shown below in Red, and the Impulse response in Blue.

 

 

APPLICATION GRAPH 4: NYQUIST PLOTS

The scale system allows almost any data to be displayed on either rectangular or circular grids. When magnitude/phase data is plotted using polar coordinates, a Nyquist plot results. Any LMS data curve can be displayed in this polar representation. True polar display is provided for easy viewing of the radial data with either linear, log, or dB scales.

 

 

 

 

 

 

 

 

 

 

 

APPLICATION GRAPH 5: GATED SPL RESPONSE

The gating system in LMS allows for quasi-anechoic measurements to be taken in any environment. The adjustment of gate time parameters prevents reflections from local nearby boundaries from affecting the measurement. LMS does not produce any erroneous false data below the gate frequency limit.

 

 

 

 

 

 

 

 

 

 

APPLICATION GRAPH 6: NOISE DENSITY

LMS can also be used to measure environmental noise vs. frequency using the Bandpass filters. This type of sweep will indicate where the significant energy is located. The effectiveness of isolations or damping materials can be quantitatively evaluated. Adjustments and/or improvements can be made.

 

 

 

 

 

 

 

 

 

 

 

We also use the latest equipment for both Analog and Digital amplifier and signaling designs. We carefully evaluate all facets of the design. We concentrate on the criteria shown below as a norm in our design process, along with special attributes that the customer may want to design or address.

 

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