🔉 U+1F509 Unicode文字
Unicode
U+1F509
🔉
数値文字参照
🔉 🔉
URLエンコード(UTF-8)
%F0%9F%94%89
ユニコード名
SPEAKER WITH ONE SOUND WAVE
一般カテゴリ－
Symbol, Other（記号，その他）
Base64エンコード : 8J+UiQ==
「🔉」に似ている意味の文字
🔉の説明
A loudspeaker (commonly referred to as a speaker or speaker driver) is an electroacoustic transducer that converts an electrical audio signal into a corresponding sound. A speaker system, also often simply referred to as a "speaker" or "loudspeaker", comprises one or more such speaker drivers, an enclosure, and electrical connections possibly including a crossover network. The speaker driver can be viewed as a linear motor attached to a diaphragm which couples that motor's movement to motion of air, that is, sound. An audio signal, typically from a microphone, recording, or radio broadcast, is amplified electronically to a power level capable of driving that motor in order to reproduce the sound corresponding to the original unamplified electronic signal. This is thus the opposite function to the microphone; indeed the dynamic speaker driver, by far the most common type, is a linear motor in the same basic configuration as the dynamic microphone which uses such a motor in reverse, as a generator.
The dynamic speaker was invented in 1925 by Edward W. Kellogg and Chester W. Rice issued as US Patent 1,707,570. Apr 2, 1929. When the electrical current from an audio signal passes through its voice coil—a coil of wire capable of moving axially in a cylindrical gap containing a concentrated magnetic field produced by a permanent magnet—the coil is forced to move rapidly back and forth due to Faraday's law of induction; this attaches to a diaphragm or speaker cone (as it is usually conically shaped for sturdiness) in contact with air, thus creating sound waves. In addition to dynamic speakers, several other technologies are possible for creating sound from an electrical signal, a few of which are in commercial use.
In order for a speaker to efficiently produce sound, especially at lower frequencies, the speaker driver must be baffled so that the sound emanating from its rear does not cancel out the (intended) sound from the front; this generally takes the form of a speaker enclosure or speaker cabinet, an often rectangular box made of wood, but sometimes metal or plastic. The enclosure's design plays an important acoustic role thus determining the resulting sound quality. Most high fidelity speaker systems (picture at right) include two or more sorts of speaker drivers, each specialized in one part of the audible frequency range . The smaller drivers capable of reproducing the highest audio frequencies are called tweeters, those for middle frequencies are called mid-range drivers and those for low frequencies are called woofers. Sometimes the reproduction of the very lowest frequencies (20-~50 Hz) is augmented by a so-called subwoofer often in its own (large) enclosure. In a two-way or three-way speaker system (one with drivers covering two or three different frequency ranges) there is a small amount of passive electronics called a crossover network which helps direct components of the electronic signal to the speaker drivers best capable of reproducing those frequencies. In a so-called powered speaker system, the power amplifier actually feeding the speaker drivers is built into the enclosure itself; these have become more and more common especially as computer speakers.
Smaller speakers are found in devices such as radios, televisions, portable audio players, personal computers (computer speakers), headphones, and earphones. Larger, louder speaker systems are used for home hi-fi systems (stereos), electronic musical instruments, sound reinforcement in theatres and concert halls, and in public address systems.[出典:Wikipedia]
🔉の文字を使った例文
🔉「ねえ、最近友達と一緒にカラオケ行った？」 🔉「え、行ってないけど、なにかあったの？」 🔉「すごいことが起きたんだ！歌ってる途中で、ふと歌声が止まって音が出なくなったんだよ。でも、周りの音楽や人々の話し声は聞こえてる。不思議な感覚だったよ。」 🔉「何それ、まさか超能力！？」 🔉「いやいや、実はそれ、おもしろい現象なんだ。それが、カラオケ現象って呼ばれているんだ。音が止まるのは、カラオケシステム内で音声処理プログラムに問題が起こることで起こる現象なんだ。でも、周りの音や人々の話し声は、直接マイクで拾われているから聞こえ続けるんだ。」 🔉「なるほど、不思議な現象って何か迫力があるなぁ」 🔉「そうなんだ、例えば、人間の脳は、音の種類や周波数音の高低差などを聞き分けることができるから、音の出ない状態でも、周りの音を聞き分けることができるんだ。」 🔉「なんか不思議で面白いね。」 🔉「そうだね、不思議な現象は、常に人々を惹きつけるんだよね。でも、近年の科学技術の進歩によって、多くの現象が解明されつつあるから、ますます不思議なことが減ってるかもしれないけどね。」 🔉「なんかさらに興味が湧いてきたな。不思議な現象、また調べてみようかな。」 🔉「いいね、不思議なことに興味を持って、新しい知識を得るって面白いよね。」 🔉「そうだね、また新しい不思議に出会えたら教えてね！」(この例文はAIにより作成されています。特定の文字を含む文章を出力していますが内容が正確でない場合があります。)