An out-of-head localization processing apparatus comprising: Headphones comprising left and right output units (43L and 43R); left and right microphones (2L and 2R) attached to the left and right output units (43L and 43R), respectively; a measurement unit configured to collect sounds output from the left and right output units (43L and 43R) by using the left and right microphones (2L and 2R), respectively, and thereby measure left and right headphone transfer characteristics, respectively; an inverse-filter calculation unit configured to calculate inverse filters of the left and right headphone transfer characteristics, respectively, in a frequency domain; a correction unit configured to calculate correction filters by correcting the inverse filters in the frequency domain; a convolution calculation unit configured to perform convolution processing for reproduced signals by using spatial acoustic transfer characteristics; a filter unit (41 and 42) configured to perform convolution processing for the reproduced signal, which has been subjected to the convolution processing in the convolution calculation unit, by using the correction filters; and an input unit configured to receive a user input for selecting an optimal correction pattern from among a plurality of correction patterns, wherein the headphones output the reproduced signal into which the correction filters are convoluted, and the correction unit: corrects the inverse filters by using a predefined correction function in a first frequency band; corrects the inverse filters according to the correction pattern selected based on the user input in a second frequency band higher than the first frequency band; and sets frequency amplitude values of the correction filters to a predetermined value in a third frequency band higher than the second frequency band. Headphones comprising left and right output units (43L and 43R); left and right microphones (2L and 2R) attached to the left and right output units (43L and 43R), respectively; a measurement unit configured to collect sounds output from the left and right output units (43L and 43R) by using the left and right microphones (2L and 2R), respectively, and thereby measure left and right headphone transfer characteristics, respectively; an inverse-filter calculation unit configured to calculate inverse filters of the left and right headphone transfer characteristics, respectively, in a frequency domain; a correction unit configured to calculate correction filters by correcting the inverse filters in the frequency domain; a convolution calculation unit configured to perform convolution processing for reproduced signals by using spatial acoustic transfer characteristics; a filter unit (41 and 42) configured to perform convolution processing for the reproduced signal, which has been subjected to the convolution processing in the convolution calculation unit, by using the correction filters; and an input unit configured to receive a user input for selecting an optimal correction pattern from among a plurality of correction patterns, wherein the headphones output the reproduced signal into which the correction filters are convoluted, and the correction unit: corrects the inverse filters by using a predefined correction function in a first frequency band; corrects the inverse filters according to the correction pattern selected based on the user input in a second frequency band higher than the first frequency band; and sets frequency amplitude values of the correction filters to a predetermined value in a third frequency band higher than the second frequency band. corrects the inverse filters by using a predefined correction function in a first frequency band; corrects the inverse filters according to the correction pattern selected based on the user input in a second frequency band higher than the first frequency band; and sets frequency amplitude values of the correction filters to a predetermined value in a third frequency band higher than the second frequency band.