Abstract: A method of using a film formation apparatus for a semiconductor process includes a step of removing a by-product film deposited on an inner surface of a reaction chamber of the film formation apparatus. This step is performed while supplying a cleaning gas containing hydrogen fluoride into the reaction chamber, and forming a first atmosphere within the reaction chamber, which allows water to be present as a liquid film.

Abstract: In an acoustic apparatus, one or more front and rear speakers are provided in a space such as a car compartment. The volume levels of the audio signals output from the speakers are controlled by the volume control unit. Also, the valance between the volume levels of the audio signals from the front speaker and the rear speaker is controlled by the balance control unit. The balance control unit generally controls the balance according to the input by a user. To the front speaker or the rear speaker, an external audio signal can be supplied. When the external audio signal is supplied to one of the front speaker and the second speaker which has not been attenuated by the balance control device and the balance control device attenuates the volume level of said one of the front speaker and the second speaker, the volume level of the audio signal is attenuated. Therefore, the external audio signal becomes easy for the user to hear.

Abstract: A method of using a film formation apparatus for a semiconductor process includes a step of removing a by-product film deposited on an inner surface of a reaction chamber of the film formation apparatus. This step is performed while supplying a cleaning gas containing hydrogen fluoride into the reaction chamber, and forming a first atmosphere within the reaction chamber, which allows water to be present as a liquid film.

Abstract: A source selection apparatus comprises: a first source selection device which selects one source out of one or more sources belonging to a first source group; a second source selection device which selects one source out of one or more sources belonging to a second source group; a determination device which determines a kind of contents recorded on an information recording medium; and an allocation device which, based on the kind of the contents, allocates the kind of the contents to either the first source selection device or the second source selection device as the source to be thereby selectable.

Abstract: Serial numbers are assigned to individual music file contained in music file group with layered structure. Based on the serial number, folder and file numbers of one music file is determined when it is input externally, and one music file is selected on the basis of the folder and file numbers.

Abstract: An electronic device does not carry out control operation corresponding to a signal from an operation button which is kept in pressed state when electric power is supplied. When electric power is supplied, the voltage changing depending on open and closed state of switches SW1 to SW4 corresponding to operation buttons to be manipulated is judged to be a specified value or not. When the voltage is not judged to be specified value, the control unit does not carry out control operation corresponding to the signal from the operation button that has been in pressed state.

Abstract: An electronic device does not carry out control operation corresponding to a signal from an operation button which is kept in pressed state when electric power is supplied. When electric power is supplied, the voltage changing depending on open and closed state of switches SW1 to SW4 corresponding to operation buttons to be manipulated is judged to be a specified value or not. When the voltage is not judged to be specified value, the control unit does not carry out control operation corresponding to the signal from the operation button that has been in pressed state.

Abstract: In an acoustic apparatus, one or more front and rear speakers are provided in a space such as a car compartment. The volume levels of the audio signals output from the speakers are controlled by the volume control unit. Also, the valance between the volume levels of the audio signals from the front speaker and the rear speaker is controlled by the balance control unit. The balance control unit generally controls the balance according to the input by a user. To the front speaker or the rear speaker, an external audio signal can be supplied. When the external audio signal is supplied to one of the front speaker and the second speaker which has not been attenuated by the balance control device and the balance control device attenuates the volume level of said one of the front speaker and the second speaker, the volume level of the audio signal is attenuated. Therefore, the external audio signal becomes easy for the user to hear.

Abstract: A voice-operated remote control system which transmits a remote control signal in response to a voice command has a degree-of-importance determining unit for determining the degree of importance of the voice command that is applied to the remote control system. The degree-of-importance determining unit sends a degree-of-importance signal corresponding to the degree of importance of the voice command to a recognition accuracy determining unit. Depending on the degree of importance of the input voice command as indicated by the degree-of-importance signal, the recognition accuracy determining unit determines whether the accuracy of the recognition result is high or low, and delivers only the recognition result of higher recognition accuracy to a transmitting circuit.

Abstract: A voice-operated remote control system which transmits a remote control signal in response to a voice command has a speech recognition circuit for recognizing the voice command. The speech recognition circuit has standard pattern data storage unit for storing a plurality of standard pattern data with respect to each of voice commands. The input voice command is compared with the plural standard pattern data for accurate speech recognition.