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当pwm占空比越高，啸叫声越大；pwm频率为1khz，也调过500hz依然有啸叫声；我们还买了TPS92513EVM-001模块，用我们的STM32F401RET6发出pwm信号给到TPS92513EVM-001；依然有啸叫声，这个现象应该如何解决？
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