Abstract: Provided are a noise cancellation method and apparatus, an electronic device, a noise cancellation earphone, and a storage medium. The method includes acquiring original sound source information; performing noise reduction (NR) processing on the original sound source information using active noise cancellation (ANC) to obtain first sound information and performing the NR processing on the original sound source information using environmental noise cancellation (ENC) to obtain second sound information; and mixing and adding the first sound information and the second sound information to obtain target sound information and playing the target sound information. In this method, the NR processing can be performed on the sound using the ANC and the ENC, thereby distinguishing environmental noise from human voice, improving the noise cancellation performance, and enabling a user to hear clearer sound.

Abstract: A pneumatic tool includes a casing unit, an air motor, a rotary valve, and a turning unit. The rotary valve is mounted to the air motor and is rotatable about a valve axis. The turning unit includes a ring member that surrounds and is rotatably mounted to the casing unit, and that is connected to the rotary valve, such that rotation of the ring member relative to the casing unit drives the rotary valve to rotate about the valve axis relative to the air motor among a first-end position, a second-end position and at least one in-between position for adjusting airflow that travels from an air inlet passage of the casing unit, through an opening and an intermediate passage of the rotary valve, to an air chamber of the air motor.

Abstract: A pneumatic tool includes a casing unit, an air motor, a rotary valve, and a turning unit. The rotary valve is rotatably mounted to the air motor. The turning unit is movably mounted to the casing unit, and is connected to the rotary valve such that movement of the turning unit relative to the casing unit drives rotation of the rotary valve relative to the air motor to one of a first-end position, a second-end position and at least one in-between position, in which an opening of the rotary valve is in spatial communication with a respective one of a first passage, a second passage and at least one sub-passage for adjusting airflow that travels from an air inlet passage of the casing unit, through the rotary valve, and into the air motor.

Abstract: A pneumatic tool includes a casing unit, an air motor, a rotary valve, and a turning unit. The rotary valve is rotatably mounted to the air motor. The turning unit is movably mounted to the casing unit, and is connected to the rotary valve such that movement of the turning unit relative to the casing unit drives rotation of the rotary valve relative to the air motor to one of a first-end position, a second-end position and at least one in-between position, in which an opening of the rotary valve is in spatial communication with a respective one of a first passage, a second passage and at least one sub-passage for adjusting airflow that travels from an air inlet passage of the casing unit, through the rotary valve, and into the air motor.

Abstract: A pneumatic tool includes a casing unit, an air motor, a rotary valve, and a turning unit. The rotary valve is mounted to the air motor and is rotatable about a valve axis. The turning unit includes a ring member that surrounds and is rotatably mounted to the casing unit, and that is connected to the rotary valve, such that rotation of the ring member relative to the casing unit drives the rotary valve to rotate about the valve axis relative to the air motor among a first-end position, a second-end position and at least one in-between position for adjusting airflow that travels from an air inlet passage of the casing unit, through an opening and an intermediate passage of the rotary valve, to an air chamber of the air motor.

Abstract: A pneumatic tool includes a front housing, an air cylinder, a rotor and a rear housing. The front housing includes a first depressing portion recessedly formed at an end thereof. The air cylinder includes a cylinder body and a front end cover. The cylinder body includes a first end, a second end and at least one exhaust channel. The first end is engaged with the first depressing portion. The exhaust channel is formed at the cylinder body. The front end cover is engaged with the first end. The rear housing includes a second depressing portion recessedly formed at an end thereof. The second end of the cylinder body is engaged with the second depressing portion. The front housing is assembled with the rear housing, and the front housing and the rear housing abut against the air cylinder in an airtight manner.