Flow control apparatus and flow control generation device thereof for generating DC control signal based on audio signal

A flow control apparatus, comprising:

• a flow control signal generation device for generating a DC control signal based on an audio signal, comprising:
• an audio receiving module, for providing an audio signal;
• a filter rectifier module, electrically connected to the audio receiving module, for filtering the audio signal to generate at least one DC audio signal;
• a microprocessor, electrically connected to the filter rectifier module, for analyzing strength of the at least one DC audio signal within a plurality of time periods to generate a plurality of period strength values, and comparing the period strength values and a predetermined attenuated strength value to generate a plurality of period attenuated values;
• and
• a proportional valve control signal generation module, comprising:
• a first low-pass filter, electrically connected to the audio receiving module, for receiving and filtering the audio signal to generate a first low frequency-band signal, and a frequency of the first low frequency-band signal being under a first frequency;
• an attenuator, electrically connected to the first low-pass filter and the microprocessor, for attenuating a strength value of the first low frequency-band signal to a value close to the predetermined attenuated strength value based on the period attenuated values;
• a second low-pass filter, electrically connected to the attenuator, for receiving and filtering the first low frequency-band signal to generate a second low frequency-band signal, and a frequency of the second low frequency-band signal being under a second frequency which is smaller than the first frequency;
• and
• a first rectifier filter, electrically connected to the second low-pass filter, for converting the second low frequency-band signal into a DC control signal;
• and
• at least a proportional valve, connected between a fluid supplier and at least one nozzle, and electrically connected to the proportional valve control signal generation module for receiving the DC control signal, and the at least one proportional valve controlling a flow volume provided by the fluid supplier through the at least one proportional valve to the at least one nozzle based on the DC control signal.