Study on the Characteristics of Electromagnetic Noise of Axial Flux Permanent Magnet Synchronous Motor

Table 6

Comparation between calculated and measured values of Sound power lever.

Frequency/Hz	Calculation after; correction/dB (A)	Measured; value/dB (A)	Error/%
165	72.60	72.6	0
330	59.73	59.1	1.06
660	48.15	48.5	−0.7
Combining	72.6	72.6	0