In this work, determination of the best suitable cutting conditions and cutting parameters during machining of AISI 304 stainless steels has been aimed by taking into consideration process sound. For determination of the best Cutting parameters in the stainless steels machining. the samples which were prepared to be used in the experiment, 200 mm in length and 30 turn in diameter, were machined in a CNC turning centre. Each part of samples was machined through the 150 mm length and the depth of cut was 2.5 mm. Turning tests were performed with three different feed rates (0.2, 0.25 0.3 mm/rev) at each cutting speed, 120, 135, 150 165, 180 m/min. During experiments, process Sounds were recorded by a computer incorporating a microphone. The best Cutting speed and feed rate were determined according to flank wear, built Lip edge, chip form, Surface roughness of the machined samples and machine tool power Consumption. The ideal cutting parameters and Cutting process Sounds obtained were compared. In this way, the best cutting parameters Could be determined depending on the sound. Finally, cutting speed of 165 m/min and feed rate of 0.25 mm/rev gave the best results and the analyses of the process sound confirmed these values. (C) 2004 Elsevier Ltd. All rights reserved.