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• 音頻頻譜分析儀Marina PolyanskayaFree with purchases4.5 · 3,040 ratings
• Spectrum AnalyzerMarina PolyanskayaPaid · $3.994.5 · 245 ratings
• dB Decibel Meter - sound level measurement toolMarina PolyanskayaPaid · $1.994.5 · 235 ratings
• Octave Band Real Time Frequency Analyzer and Sound Level MeterMarina PolyanskayaPaid · $1.992.6 · 5 ratings