NVHMajor-appliance / cleaning-appliance production lines
Appliance Sound-Power Compliance at End of Line
01
Pain Points
- !Washers/AC units/range hoods must run sound power for the energy label — heavy manual computation.
- !A-weighting, octave bands, environmental correction, and surface synthesis chain together and must be recomputed for every unit.
- !PASS/FAIL and the end-of-line report are scattered across multiple tools.
02
The Tinia Approach
Per-channel A-weighting + one-third octave, synthesize L_WA over the measurement surface, and auto-judge PASS/FAIL — production sampling reuses the same workflow directly.
Channel splitA-weightingSound levelOne-third octaveSynthesize L_WAPASS/FAIL
03
Nodes Used
Channel Splitchannel_split
Split the synchronized multi-mic channelsFrequency Weightingweighting_filter
A-weightingSound Level Meterlevel_meter
Sound level at each pointOctave Analysisoctave_analysis
One-third octave spectrumIndicator Mathindicator_math
Synthesize L_WA over the measurement surfaceSpec Limit Checkspec_limit_check
PASS / FAIL evaluationCore nodes; add or remove steps as needed for your data and standards — the node graph is always editable.
04
Expected Output
- A single L_WA sound-power value (dB) + one-third-oct spectrum.
- PASS / FAIL evaluation and an end-of-line report view.
- A standardized workflow reusable for production sampling.
Reference Standards / Engineering PracticeIEC 60704 series · ISO 3744
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