Start: go to the homepage U+1F300 bis U+1F5FF Miscellaneous Symbols and Pictographs
Zeichen für U+1F4E2
Quelle: Noto Emoji

U+1F4E2 Public Address Loudspeaker

U+1F4E2 wurde in Version 6.0 in 2010 zu Unicode hinzugefügt. Er gehört zum Block U+1F300 bis U+1F5FF Miscellaneous Symbols and Pictographs in der U+10000 bis U+1FFFF Supplementary Multilingual Plane.

Dieses Zeichen ist ein Other Symbol und wird allgemein verwendet, das heißt, in keiner speziellen Schrift.

Das Zeichen ist keine Zusammensetzung. Seine Weite in ostasiatischen Texten ist weite. In bidirektionalem Text handelt es als Other Neutral. Bei einem Richtungswechsel wird es nicht gespiegelt. U+1F4E2 bietet eine Zeilenumbruch-Gelegenheit an seiner Position, außer in einigen numerischen Kontexten.

Das CLDR-Projekt bezeichnet dieses Zeichen mit „Lautsprecher“ für die Verwendung in Screenreader-Software. Es weist zusätzliche Namen zu, z.B. für die Suche in Emoji-Auswahlboxen: Megafon, Schallendes Megafon.

Dieses Schriftzeichen ist als Emoji ausgezeichnet. Es wird als buntes Emoji auf unterstützenden Plattformen angezeigt. Um es auf schwarz-weiße Ansicht zu reduzieren, kannst du es mit Zeichen für U+FE0E Variation Selector-15 kombinieren: 📢︎ Siehe Emojipedia für weitere Details zu den Emoji-Eigenschaften dieses Zeichens.

Die Wikipedia hat die folgende Information zu diesem Codepunkt:

A horn loudspeaker is a loudspeaker or loudspeaker element which uses an acoustic horn to increase the overall efficiency of the driving element(s). A common form (right) consists of a compression driver which produces sound waves with a small metal diaphragm vibrated by an electromagnet, attached to a horn, a flaring duct to conduct the sound waves to the open air. Another type is a woofer driver mounted in a loudspeaker enclosure which is divided by internal partitions to form a zigzag flaring duct which functions as a horn; this type is called a folded horn speaker. The horn serves to improve the coupling efficiency between the speaker driver and the air. The horn can be thought of as an "acoustic transformer" that provides impedance matching between the relatively dense diaphragm material and the less-dense air. The result is greater acoustic output power from a given driver.

The narrow part of the horn next to the driver is called the "throat" and the large part farthest away from the driver is called the "mouth". The angular coverage (radiation pattern) of the horn is determined by the shape and flare of the mouth. A major problem of horn speakers is that the radiation pattern varies with frequency; high frequency sound tends to be emitted in narrow beams with poor off-axis performance. Significant improvements have been made, beginning with the "constant directivity" horn invented in 1975 by Don Keele.

The main advantage of horn loudspeakers is they are more efficient; they can typically produce approximately 10 times: p.30  (10 dB) more sound power than a cone speaker from a given amplifier output. Therefore, horns are widely used in public address systems, megaphones, and sound systems for large venues like theaters, auditoriums, and sports stadiums. Their disadvantage is that their frequency response is more uneven because of resonance peaks, and horns have a cutoff frequency below which their response drops off. (The cutoff frequency corresponds to the wavelength equal to the circumference of the horn mouth.) To achieve adequate response at bass frequencies horn speakers must be very large and cumbersome, so they are more often used for midrange and high frequencies. The first practical loudspeakers, introduced around the turn of the 20th century, were horn speakers. Due to the development in recent decades of cone loudspeakers which sometimes have a flatter frequency response, and the availability of inexpensive amplifier power, the use of horn speakers in high fidelity audio systems over the last decades has declined.

Darstellungen

System Darstellung
Nr. 128226
UTF-8 F0 9F 93 A2
UTF-16 D8 3D DC E2
UTF-32 00 01 F4 E2
URL-kodiert %F0%9F%93%A2
HTML hex reference 📢
Falsches windows-1252-Mojibake 📢
Kodierung: GB18030 (Hex-Bytes) 94 39 E0 30

Anderswo

Vollständiger Eintrag

Eigenschaft Wert
Alter (age) 6.0 (2010)
Unicode-Name (na) PUBLIC ADDRESS LOUDSPEAKER
Unicode-1-Name (na1) —
Block (blk) Miscellaneous Symbols and Arrows
Allgemeine Kategorie (gc) Other Symbol
Schrift (sc) Common
Bidirectional Category (bc) Other Neutral
Combining Class (ccc) Not Reordered
Dekompositionstyp (dt) none
Decomposition Mapping (dm) Zeichen für U+1F4E2 Public Address Loudspeaker
Kleinbuchstabe (Lower) ✘
Simple Lowercase Mapping (slc) Zeichen für U+1F4E2 Public Address Loudspeaker
Lowercase Mapping (lc) Zeichen für U+1F4E2 Public Address Loudspeaker
Großbuchstabe (Upper) ✘
Simple Uppercase Mapping (suc) Zeichen für U+1F4E2 Public Address Loudspeaker
Uppercase Mapping (uc) Zeichen für U+1F4E2 Public Address Loudspeaker
Simple Titlecase Mapping (stc) Zeichen für U+1F4E2 Public Address Loudspeaker
Titlecase Mapping (tc) Zeichen für U+1F4E2 Public Address Loudspeaker
Case Folding (cf) Zeichen für U+1F4E2 Public Address Loudspeaker
ASCII Hex Digit (AHex) ✘
Alphabetic (Alpha) ✘
Bidi-Kontrollzeichen (Bidi_C) ✘
Bidi Mirrored (Bidi_M) ✘
Composition Exclusion (CE) ✘
Case Ignorable (CI) ✘
Changes When Casefolded (CWCF) ✘
Changes When Casemapped (CWCM) ✘
Changes When NFKC Casefolded (CWKCF) ✘
Changes When Lowercased (CWL) ✘
Changes When Titlecased (CWT) ✘
Changes When Uppercased (CWU) ✘
Cased (Cased) ✘
Full Composition Exclusion (Comp_Ex) ✘
Default Ignorable Code Point (DI) ✘
Dash (Dash) ✘
Veraltet (Dep) ✘
Diakritisch (Dia) ✘
Emoji Modifier Base (EBase) ✘
Emoji Component (EComp) ✘
Emoji Modifier (EMod) ✘
Emoji-Darstellung (EPres) ✔
Emoji (Emoji) ✔
Extender (Ext) ✘
Extended Pictographic (ExtPict) ✔
FC NFKC Closure (FC_NFKC) Zeichen für U+1F4E2 Public Address Loudspeaker
Grapheme Cluster Break (GCB) Egal
Grapheme Base (Gr_Base) ✔
Grapheme Extend (Gr_Ext) ✘
Grapheme Link (Gr_Link) ✘
Hex Digit (Hex) ✘
Hyphen (Hyphen) ✘
ID Continue (IDC) ✘
ID-Start (IDS) ✘
IDS Binary Operator (IDSB) ✘
IDS Trinary Operator and (IDST) ✘
IDSU (IDSU) 0
ID_Compat_Math_Continue (ID_Compat_Math_Continue) 0
ID_Compat_Math_Start (ID_Compat_Math_Start) 0
Ideogramm (Ideo) ✘
InCB (InCB) None
Indic Mantra Category (InMC) —
Indic Positional Category (InPC) NA
Indic Syllabic Category (InSC) Other
Jamo Short Name (JSN) —
Verbindungskontrollzeichen (Join_C) ✘
Logische Reihenfolgenausnahme (LOE) ✘
Modifier Combining Mark (MCM) ✘
Math (Math) ✘
Nicht-Zeichen-Codepunkt (NChar) ✘
NFC Quick Check (NFC_QC) Ja
NFD Quick Check (NFD_QC) Ja
NFKC Casefold (NFKC_CF) Zeichen für U+1F4E2 Public Address Loudspeaker
NFKC Quick Check (NFKC_QC) Ja
NFKC_SCF (NFKC_SCF) Zeichen für U+1F4E2 Public Address Loudspeaker
NFKD Quick Check (NFKD_QC) Ja
Other Alphabetic (OAlpha) ✘
Other Default Ignorable Code Point (ODI) ✘
Other Grapheme Extend (OGr_Ext) ✘
Other ID Continue (OIDC) ✘
Other ID Start (OIDS) ✘
Other Lowercase (OLower) ✘
Other Math (OMath) ✘
Other Uppercase (OUpper) ✘
Prepended Concatenation Mark (PCM) ✘
Pattern Syntax (Pat_Syn) ✘
Pattern White Space (Pat_WS) ✘
Quotation Mark (QMark) ✘
Regional Indicator (RI) ✘
Radical (Radical) ✘
Sentence Break (SB) Andere
Soft Dotted (SD) ✘
Sentence Terminal (STerm) ✘
Terminal Punctuation (Term) ✘
Unified Ideograph (UIdeo) ✘
Variation Selector (VS) ✘
Word Break (WB) Andere
White Space (WSpace) ✘
XID Continue (XIDC) ✘
XID-Start (XIDS) ✘
Expands On NFC (XO_NFC) ✘
Expands On NFD (XO_NFD) ✘
Expands On NFKC (XO_NFKC) ✘
Expands On NFKD (XO_NFKD) ✘
Bidi Paired Bracket (bpb) Zeichen für U+1F4E2 Public Address Loudspeaker
Bidi Paired Bracket Type (bpt) None
Ostasiatische Weite (ea) weite
Hangul Syllable Type (hst) Nicht anwendbar
ISO 10646 Comment (isc) —
Joining Group (jg) No_Joining_Group
Joining Type (jt) Non Joining
Line Break (lb) Ideogramm
Numerischer Typ (nt) none
Numerischer Wert (nv) keine Nummer
Simple Case Folding (scf) Zeichen für U+1F4E2 Public Address Loudspeaker
Schrifterweiterung (scx)
Vertical Orientation (vo) U