Title:
NOISE REDUCTION SYSTEM FOR INFORMATION PROCESSOR
Document Type and Number:
Japanese Patent JP3048947
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To reduce the noises which are caused by a cooling fan when an acoustic device is used by stopping the cooling fan or decreasing its rotational frequency only when the acoustic device is used.
SOLUTION: A user gives a program to a CPU 2 for use of an acoustic device 4 after he turned on a power supply and confirmed the available state of a personal computer. Then the user manually turns on a double-pole switch 7 of the personal computer. Thus, a microphone 6 is connected to the device 4 via one of both sides of the switch 7 and at the same time the ON information of the microphone 6 is sent to a power unit 1 as a switching signal S5 via the other interlocking side of the switch 7. Under such conditions, the unit 1 recognizes the ON state of the microphone 6 owing to a fact that the signal S5 is equal to 1 and then stops a cooling fan 8 or decreases its rotational frequency.
Inventors:
Satoshi Murata
Application Number:
JP4894197A
Publication Date:
June 05, 2000
Filing Date:
March 04, 1997
Export Citation:
Assignee:
Gunma NEC Corporation
International Classes:
G06F3/16; G06F1/20; (IPC1-7): G06F1/20; G06F3/16
Domestic Patent References:
| JP4343561A |
Attorney, Agent or Firm:
Naoki Kyomoto (2 outside)