The invention relates to a method for earphone 
noise reduction and a 
noise reduction earphone. The earphone comprises a sensor and a filter 
assembly, and the method comprises the steps: detecting thecurrent 
capacitance of a 
human ear through the sensor; determining a 
current noise reduction parameter on the basis of the current 
capacitance, referring to N groups of corresponding relationships between preset 
capacitance of the 
human ear wearing the earphone and preset 
noise reduction parameters, N being a positive integer, and the 
noise reduction parameter comprising a filter coefficient of afilter enabled in the filter 
assembly; and configuring the filter 
assembly according to the 
current noise reduction parameter to reduce noise. According to the invention, the capacitance value at thecorresponding position of the 
human ear is detected through the sensor configured on the earphone, and the 
noise reduction parameter of the filter assembly in the earphone is further determined basedon the capacitance value; therefore, dynamic adjustment of the 
noise reduction parameters of the earphone can be conveniently and quickly realized, the noise reduction effect in different use scenes is ensured, the calculation load of the 
system is reduced, and the listening experience of a user is improved.