A method for processing a sound signal, comprising: receiving, by using channels of microphones located in different positions of a terminal device, three signals sent by a same sound source, wherein the three signals are in a one-to-one correspondence to the channels and wherein the three signals are sound signals, wherein the channels comprise a left channel, a right channel and a center channel and each of the channels receives one of the three signals; determining, according to three signals in the three signals, a signal delay difference between every two of the three signals, wherein a position of the sound source relative to the terminal device can be determined according to the signal delay difference; determining, according to the signal delay difference, the position of the sound source relative to the terminal device; and when it is determined that the sound source is located in front of the terminal device, performing orientation enhancement processing on a target signal in the three signals, and obtaining a right-ear output signal and a left-ear output signal of the terminal device according to a result of the orientation enhancement processing, wherein the orientation enhancement processing is as follows: L ′ = L + ∑ i = 1 N GA i × H bandi ⊗ C, R ′ = R + ∑ i = 1 N GA i × H bandi ⊗ C where the signal received on the right channel is R, the signal received on the left channel is L, the signal received on the center channel is C, the right-ear output signal is R', and the left-ear output signal is L'; ⊗ indicates a convolution of two signals, so as to implement a filter function; H low indicates a low-pass filter whose cut-off frequency is F,; H bandi indicates a band-pass filter, and a passband of the filter is [F i F i+1]; GA i indicates a filter gain coefficient when a gain adjustment is performed on the signal received on channel C, wherein N=5, F,=3kHz, F 2 =8kHz, F 3 =10kHz, F 4 =12kHz, F 5 =17kHz, and F 6 =20kHz, GA 1 =0.5, GA 2 =0, GA 3 =0.5, GA 4 =0, and GA 5 =0.5. receiving, by using channels of microphones located in different positions of a terminal device, three signals sent by a same sound source, wherein the three signals are in a one-to-one correspondence to the channels and wherein the three signals are sound signals, wherein the channels comprise a left channel, a right channel and a center channel and each of the channels receives one of the three signals; determining, according to three signals in the three signals, a signal delay difference between every two of the three signals, wherein a position of the sound source relative to the terminal device can be determined according to the signal delay difference; determining, according to the signal delay difference, the position of the sound source relative to the terminal device; and when it is determined that the sound source is located in front of the terminal device, performing orientation enhancement processing on a target signal in the three signals, and obtaining a right-ear output signal and a left-ear output signal of the terminal device according to a result of the orientation enhancement processing, wherein the orientation enhancement processing is as follows: L ′ = L + ∑ i = 1 N GA i × H bandi ⊗ C, R ′ = R + ∑ i = 1 N GA i × H bandi ⊗ C where the signal received on the right channel is R, the signal received on the left channel is L, the signal received on the center channel is C, the right-ear output signal is R', and the left-ear output signal is L'; ⊗ indicates a convolution of two signals, so as to implement a filter function; H low indicates a low-pass filter whose cut-off frequency is F,; H bandi indicates a band-pass filter, and a passband of the filter is [F i F i+1]; GA i indicates a filter gain coefficient when a gain adjustment is performed on the signal received on channel C, wherein N=5, F,=3kHz, F 2 =8kHz, F 3 =10kHz, F 4 =12kHz, F 5 =17kHz, and F 6 =20kHz, GA 1 =0.5, GA 2 =0, GA 3 =0.5, GA 4 =0, and GA 5 =0.5.