The present invention discloses a file uploading method, a client, and an application server in cloud storage, and a cloud storage system. The brush head includes a bottom surface and a body together defining a cavity for receiving the first brushing member. The read values may be soft data or hard data. One or more candidate word strings are selected based on the one or more processed words. A specifying part 114 considers the level of the audio signal stored in the first buffer 121 as the level of the environmental noise and the level of the audio signal sequentially stored in the second buffer 122 as the level of sound generated at a current time to calculate an SN ratio.