Noise reduction system, disk storage unit, hard disk drive and noise reduction method
AssigneeInternational Business Machines Corporation
InventorsYoshihiro Fujie, Yoshihiko Terashita
Life of this patent
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Abstract
An active noise canceller outputs a noise pattern learning request signal to a hard disk drive causing the hard disk drive to perform a predetermined operation, receives noise at this moment through a sound-receiving unit, and stores, in a nonvolatile memory unit, a relationship between the noise and a head operation data signal output from the hard disk drive. Based on the operation data signal outputted from the hard disk drive, the active noise canceller generates a noise-canceling sound while making a reference to the above relationship stored in the nonvolatile memory unit. Therefore, the signal processing needs a low degree of response for operating the noise-canceling sound.
Claims17
A noise reduction system comprising:
- a disk storage unit including a disk capable of storing data and a head writing or reading said data to or from said disk;
- an active noise canceller generating a noise-canceling sound which reduces a noise generated by said disk storage unit;
- and
- a memory unit storing relationship between operational states and noises in said disk storage unit,
- wherein said disk storage unit outputs to said active noise canceller an operation data signal representing an operational state of said disk storage unit when it operates, and
- said active noise canceller generates said noise-canceling sound by referring to said relationship stored in said memory unit based on said operation data signal outputted from said disk storage unit.
A disk storage comprising:
- a disk storage unit having a disk capable of storing data;
- a vibration-generating unit generating vibration for reducing an operational sound generated by said disk storage unit;
- a sound-receiving unit receiving the operational sound which said disk storage unit generates at the time of driving, and outputting to said vibration-generating unit an operational sound signal based on said operational sound;
- and
- a memory unit storing, in an associative manner, said operational state and a received sound signal based on the operational sound generated when said disk storage unit is operated in a predetermined operational state,
- wherein said vibration-generating unit generates said vibration based on said operational sound signal outputted by said sound-receiving unit and the relationship between said sound receiving signal and said operational state stored in said memory unit.
A hard disk drive comprising:
- a disk capable of storing data;
- a head writing or reading said data to or from said disk;
- a head control unit controlling the operation of said head and producing a seek operation signal representing the seek operation of said head;
- and
- a memory unit storing said seek operation signal outputted by said head control unit.
A hard disk drive comprising:
- a disk capable of storing data;
- a head writing or reading said data to or from said disk;
- and
- a head control unit controlling the operation of said head and producing a seek operation signal representing the seek operation of said head,
- wherein said head control unit is connected to an active noise canceller that outputs a noise-canceling sound for reducing a noise generated by said seek operation, and sends said seek operation signal to said active noise canceller.
A noise reduction method comprising:
- a first step of causing a hard disk drive to perform a predetermined operation and receiving a noise generated due to said predetermined operation;
- a second step of storing said noise received and said predetermined operation in an associative manner;
- a third step of identifying an operational state of said hard disk drive in a predetermined driving period;
- and
- a fourth step of identifying said predetermined operation corresponding to said operational state identified in said third step, and outputting a noise-canceling sound for reducing said noise corresponding to said predetermined operation.
Dependencies are inferred from the claim text.