What is claimed is:
1) An audio apparatus, comprising:
an recognizing logic for recognizing an external connection situation;
an audio volume setting logic for setting an audio volume according to the external connection situation recognized by said recognizing logic; and
a built-in speaker for outputting the audio volume set by said audio volume setting logic.
2) The apparatus according to claim 1, wherein said recognizing logic recognizes one, or two or more, of power supply source connection situation, network connection situation, external voice output apparatus connection situation, and peripheral apparatus connection situation, as said external connection situation.
3) The apparatus according to claim 2, wherein said audio volume setting logic sets the audio volume according to one, or a combination of two or more, of power supply source connection situation, network connection situation, external speaker connection situation, and peripheral apparatus connection situation.
4) The apparatus according to claim 1, wherein said audio volume setting logic increasesdecreases or mutes the audio volume controlled by a user according to the external connection situation.
5) An audio volume control method in an audio apparatus, wherein:
hypothetical computer apparatus usage situations and audio volumes corresponding to those usage situations are stored in relational fashion;
said hypothetical connection situations and the actual connection situation are compared when the audio apparatus is actually used; and
when said actual connection situation and a said hypothetical connection situation match, the audio volume according to said hypothetical connection situation is extracted from said storage contents and used as the audio volume output from that audio apparatus.
6) The method according to claim 5, wherein, when the actual connection situation of said audio apparatus changes, said hypothetical connection situations and the actual connection situation are compared again, and the audio volume output from that audio apparatus is controlled on the basis of the result.
7) A computer apparatus, comprising:
a built-in speaker incorporated into the computer apparatus;
an audio volume control logic for controlling the audio volume output from said built-in speaker;
a storage unit for storing, in relational fashion, hypothetical computer apparatus usage situations and audio volumes corresponding to those usage situations; and
a recognizing logic for recognizing the actual usage situation of the computer apparatus,
wherein said audio volume control logic selects, on the basis of the actual usage situation recognized by said recognizing logic, an audio volume suitable for that usage situation from said storage unit and sets that selected audio volume as the audio volume output from said built-in speaker.
8) The apparatus according to claim 7, wherein:
said computer apparatus uses a battery built into said computer apparatus or an external AC power supply as a power supply source;
said storage unit performs, in a relational fashion, storage of muting as the suitable audio volume when the power supply source of the computer apparatus is said battery; and
when said recognizing logic recognizes said battery as said power supply source, said audio volume control logic mutes the audio volume output from said built-in speaker.
9) The apparatus according to claim 8, further comprising an indicator whereby, when said audio volume control logic mutes the audio volume, the fact that the audio volume is being muted is indicated visually.
10) An audio apparatus, comprising:
a muting logic for muting the output audio volume; and
a mute canceling logic for canceling muting after the set value of the muted audio volume is changed during muting by said muting logic.
11) The apparatus according to claim 10, wherein said mute canceling logic comprises:
a first mute canceling logic for canceling muting after the set value of the muted audio volume has been increased; and
a second mute canceling logic for canceling muting after the set value of the muted audio volume has been decreased.
12) The apparatus according to claim 11, further comprising a third mute canceling logic for canceling muting without changing the set value of the muted audio volume.
13) The apparatus according to claim 10, comprising an audio volume indicator for visually indicating the set value of the muted audio volume.
14) A computer apparatus, comprising:
a built-in speaker incorporated into the computer apparatus; and
an audio volume control logic for controlling the audio volume output from said built-in speaker,
wherein said audio volume control logic comprises a function whereby, when said output audio volume is being muted, said output audio volume is changed before muting is canceled, and muting is canceled later.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. An optical amplifier comprising:
a plurality of optical amplification mediums producing a gain, the gain having gain-characteristics of a wavelength band;
an excitation source stimulating the amplification mediums;
a gain controller constantly maintaining the gain, including at least one gain peak, for each optical amplification medium by use of the excitation source; and
a plurality of gain-equalizers, respectively positioned after each optical amplification medium, equalizing the gain-characteristics of the wavelength band, each of the gain-equalizers having a transmittance band and an elimination wavelength band, the transmittance band providing a flat gain characteristic in the gain-characteristic of the wavelength band by a characteristic of the gain-equalizer, and the elimination bands being eliminated from the amplification mediums gain, including the gain peak.
2. An optical amplifier according to claim 1, wherein the gain equalizers have nearly the same equalizing characteristics.
3. An optical amplifier according to claim 1, wherein the optical amplifier has nearly even gain characteristics.
4. An optical amplifier according to claim 1, wherein the optical amplification mediums are made of erbium doped fibers.
5. An optical amplifier according to claim 1, wherein the constant gain of the optical amplification mediums is associated with an inversion ratio of about 0.8 to about 1.0 within the amplification medium.
6. An optical amplifier according to claim 1, wherein the gain equalizer obtains equalized gain within a wavelength-band from about 1490 nm to about 1530 nm.
7. An optical amplifier according to claim 1, wherein each gain equalizer attenuates gain at a peak wavelength.
8. An optical amplifier according to claim 1, wherein each gain equalizer produces an output, and the output has a nearly even gain characteristic.
9. An optical amplifier, comprising:
a plurality of optical amplification mediums for producing a gain, the gain having gain-characteristics of a wavelength band;
a gain controller maintaining a constant population inversion ratio for each of the optical amplification mediums, each optical amplification medium having a wavelength characteristic that includes a gain peak; and
a plurality of gain-equalizers, respectively positioned after each optical amplification medium, equalizing each output light of the preceding optical amplifier medium for passing through a predetermined wavelength band in the gain-characteristic of the wavelength band, and eliminating an eliminating band including the gain peak.
10. An optical amplifier, comprising:
a plurality of optical amplification mediums, each producing a gain with a gain-characteristic of a wavelength band;
a gain controller controlling the gain-characteristic of the wavelength band of each of the optical amplification mediums with substantially equal gain-characteristics of the wavelength band, the equal gain-characteristics having at least one gain peak in the wavelength band; and
a plurality of optical gain-equalizers respectively positioned after each optical amplification medium equalizing each output light of the preceding optical amplification medium, outputting an output light having substantially flat power characteristics, and eliminating an eliminating band of the gain-characteristic of the wavelength band, the eliminating band including the gain peak.
11. An optical amplifier according to claim 10, wherein each of the gain-equalizers pass light having flat power characteristics within the predetermined wavelength band and minimize gain outside of the predetermined wavelength band.