🔊 U+1F50A Unicode文字
Unicode
U+1F50A
🔊
数値文字参照
🔊 🔊
URLエンコード(UTF-8)
%F0%9F%94%8A
ユニコード名
SPEAKER WITH THREE SOUND WAVES
一般カテゴリ－
Symbol, Other（記号，その他）
Base64エンコード : 8J+Uig==
「🔊」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
🔊テーマパークの中で、最も人気のあるアトラクションは何だと思いますか？ 🔊私たちが調べた結果、最も人気のあるアトラクションは「ローラーコースター」であることがわかりました。ローラーコースターは、長い間愛され続けてきたアトラクションであり、その旋回、急降下、急上昇など、さまざまな動きで人々を魅了しています。 🔊しかし、近年、人気を博しているアトラクションの一つに「バーチャルリアリティ」を活用したコースターがあります。これは、VRヘッドセットを身に着けたまま、実際に乗り物に乗るような感覚を体験することができます。 🔊また、最新の技術を活用した新しいアトラクションも登場しています。例えば、「スカイスクレーパー」というアトラクションは、高さ150メートル以上の超高層ビルの頂上からジャンプするというもので、まさに“スリル”と“恐怖”を感じることができます。 🔊一方で、最も人気のないアトラクションは何かというと、意外にも「観覧車」です。理由としては、観覧車は静かで穏やかであるため、多くの人にとっては物足りないと感じるようです。 🔊それにもかかわらず、観覧車には自然に作り出される景色を楽しむことができ、また、日中と夜間で異なる景色を見ることができるなど、それなりに楽しみ方があるアトラクションです。 🔊総じて、アトラクションは時代とともに進歩しており、今後もよりスリルや興奮を追求した新しいアトラクションが登場することは間違いありません。しかし、何よりも、安全に楽しめることが最も重要なポイントであると言えます。(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。)