Ϊ��֤ Choi-Williams �����ֲ�ʱƵ������������Ч�ԣ������������������⾮�źŴ���֮�С�����������������ѷ��Եز���нϺõ����ֺ�ʶ�����������ҿ�����Ч�����ƶ�Ƶ�ʳɷ��źŵĽ����Ը��ţ������صõ������⾮�źŵ�ʱƵ�ֲ����ܼ������������������Եز���˵�������⾮�źŵĸ���ֲ��������Ե�˥���������ѷ��Եز���˵��˹ͨ�����������нϴ���ȵ�˥��; ����ȸ��ã���͸��Խ�õ��ѷ��˹ͨ������˥��Ӱ�����; �Შ��˥������͸�Ը��õ��ѷ��и������ԡ�

In order to verify the validity of Choi-Williams energy distribution time- frequency analysis method�� it is used for signal analysis of array acoustic logging�� The study shows that it has a good ability to identify and distinguish the fractured strata and can suppress the cross interference of the multi frequency component signal effec- tively�� and get the time- frequency distribution and characteristics of the acoustic logging signal�� In the compact rock strata��all the waves of acoustic logging signal have no obvious attenuation�� In the fractured strata��the energy of Stoneley wave will be attenuated greatly�� The better fragmentation and permeability of fracture are��the greater effect it has on attenuation of Stonely wave�� The attenuation of S- wave is more obvious in a fracture with better per- meability��