Natural Melody Technology Inc.

General Design Process

Organization Chart

Total : 22 people | Acoustic Engineer : 8 people | Engineer : 6 people | Acoustic Engineer : 8 people

Development flow chart

NPI Process

NPI Team: PM, QA, PMC, RD, PE

EVT

Develop Spec.,
Sample production and testing,
Establish Spec. Sheet

DVT

Establish key process control point,
Record ingredient test data,
performance test, 100% inspection,
collect PPK data,
establish BOM and cost analysis

PVT

Establish QC process chart and
operation instructions,
execute product reliability
test to ensure to reach the 95% yield rate.

MP

First piece inspection,
IPQC checklist,
Performance 100% inspection

Characteristic Simulation

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FEMM

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COMSOL

Magnetic circuit analysis (FEMM , COMSOL ) speaker magnetic circuit analysis is the analysis in current-carrying coil, soft magnetic materials, and physical characteristics under the interaction of permanent magnetic material.
  • The speaker driving force coefficient BLx
  • The magnetic flux line
  • The magnetic flux density
  • The relative permeability
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FINECONE

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COMSOL

Vibration analysis ( FINECONE ,COMSOL ) speaker vibration analysis system requires accurate input parts of geometric and material parameters, and the geometric model of control and composite material parameters acquisition are more difficult
  • The speaker longitude coefficient K (x)
  • High vibration mode
  • Elastic wave deviation
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FINE BOX

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COMSOL

Speaker system (FINE BOX, COMSOL ) speaker box system analysis is analyzing the physical properties of the speaker in the box and multi-cell frequency division of system design.
  • Diffraction analysis
  • Random analysis of sound box structure
  • Inverter module, nonlinear acoustic simulation
  • Design and analysis of active passive

Verification System

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*Klippel (RD)
  1. The small signal T/S parameters test
  2. LSI large signal nonlinear parameter test   analysis
  3. Part of the maximum amplitude of vibration test
  4. 3D distortion analysis
  5. The SCN segmentation vibration scan and analysis
  6. MSPM Bench material testing
  7. Size of SPM signal plucking, suspension, film properties measurement
  8. The SPL curve test
  9. The distortion test
  10. Impedance curve test
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*SoundCheck (RD)
  1. Frequency response
  2. Distortion
  3. Rub   Buzz
  4. Polarity
  5. Impedance
  6. Polar plots
  7. THD
  8. Sound pressure level
  9. T/S parameters
  10. FFT and Real Time analyses
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*Brüel   Kjær PULSE (RD)
  1. Frequency response, directional response and distortion measurement
  2. Linear and non-linear system analysis
  3. Impedance
  4. Intelligent transducer correction
  5. T/S parameters