The Whispering Gallery of St Paul's Cathedral, London A whispering gallery is usually a circular, hemispherical,

elliptical Elliptical may mean: * having the shape of an ellipse, or more broadly, any oval shape ** in botany, having an elliptic leaf shape ** of aircraft wings, having an elliptical planform * characterised by ellipsis (the omission of words), or by conc ...

or ellipsoidal enclosure, often beneath a dome or a

vault Vault may refer to: * Jumping, the act of propelling oneself upwards Architecture * Vault (architecture), an arched form above an enclosed space * Bank vault, a reinforced room or compartment where valuables are stored * Burial vault (enclosure ...

, in which whispers can be heard clearly in other parts of the gallery. Such galleries can also be set up using two parabolic dishes. Sometimes the phenomenon is detected in caves.

Theory

A whispering gallery is most simply constructed in the form of a circular wall, and allows whispered communication from any part of the internal side of the circumference to any other part. The sound is carried by waves, known as

whispering-gallery wave Whispering-gallery waves, or whispering-gallery modes, are a type of wave that can travel around a concave surface. Originally discovered for sound waves in the whispering gallery of St Paul's Cathedral, they can exist for light and for other wave ...

s, that travel around the circumference clinging to the walls, an effect that was discovered in the whispering gallery of St Paul's Cathedral in London. The extent to which the sound travels at St Paul's can also be judged by clapping in the gallery, which produces four echoes. Other historical examples

C. V. Raman Sir Chandrasekhara Venkata Raman (; 7 November 188821 November 1970) was an Indian physicist known for his work in the field of light scattering. Using a spectrograph that he developed, he and his student K. S. Krishnan discovered that when ...

On whispering galleries, Proc. Indian Ass. Cult. Sci. 7, 159, 1921-1922.
/ref>W. C. Sabine, Collected Papers on Acoustics (Harvard University Press, Cambridge MA) 1922, p. 255.
/ref>Peiping (American National Red Cross, American Red Cross Embassy Club) 1946, p. 17. are the

Gol Gumbaz Gol Gumbaz (), also written Gol Gumbad, is a 17th-century mausoleum located in Bijapur, a city in Karnataka, India. It houses the remains of Mohammad Adil Shah, seventh sultan of the Adil Shahi dynasty, and some of his relatives. Begun in the ...

mausoleum in Bijapur and the Echo Wall of the

Temple of Heaven The Temple of Heaven () is a complex of imperial religious buildings situated in the southeastern part of central Beijing. The complex was visited by the Emperors of the Ming and Qing dynasties for annual ceremonies of prayer to Heaven for ...

in Beijing. A hemispherical enclosure will also guide whispering gallery waves. The waves carry the words so that others will be able to hear them from the opposite side of the gallery. The gallery may also be in the form of an ellipse or ellipsoid, with an accessible point at each

focus Focus, or its plural form foci may refer to: Arts * Focus or Focus Festival, former name of the Adelaide Fringe arts festival in South Australia Film *''Focus'', a 1962 TV film starring James Whitmore * ''Focus'' (2001 film), a 2001 film based ...

. In this case, when a visitor stands at one focus and whispers, the line of sound emanating from this focus reflects directly to the focus at the other end of the gallery, where the whispers may be heard. In a similar way, two large concave parabolic dishes, serving as

acoustic mirror An acoustic mirror is a passive device used to reflect and focus (concentrate) sound waves. Parabolic acoustic mirrors are widely used in parabolic microphones to pick up sound from great distances, employed in surveillance and reporting of ...

s, may be erected facing each other in a room or outdoors to serve as a whispering gallery, a common feature of science museums. Egg-shaped galleries, such as the

Golghar The Golghar or Gol Ghar (गोलघर), ("Round House") is a large granary located to the west of the Gandhi Maidan in Patna, capital of Bihar state, India. History According to a contemporary inscription at its base, the Golghar in Patna ...

Granary at Bankipore, and irregularly shaped smooth-walled galleries in the form of caves, such as the

Ear of Dionysius The Ear of Dionysius ( it, Orecchio di Dionisio) is a limestone cave carved out of the Temenites hill in the city of Syracuse, on the island of Sicily in Italy. Its name, given by the painter Michelangelo da Caravaggio, comes from its similar ...

in Syracuse, also exist.

Examples

India

* The

in Bijapur,

India India, officially the Republic of India (Hindi: ), is a country in South Asia. It is the seventh-largest country by area, the second-most populous country, and the most populous democracy in the world. Bounded by the Indian Ocean on the so ...

. * The

Granary in Bankipore,

. * The

Victoria Memorial The Victoria Memorial is a large marble building on the Maidan in Central Kolkata, built between 1906 and 1921. It is dedicated to the memory of Queen Victoria, Empress of India from 1876 to 1901. The largest monument to a monarch anywhere ...

Kolkata Kolkata (, or , ; also known as Calcutta , the official name until 2001) is the capital of the Indian state of West Bengal, on the eastern bank of the Hooghly River west of the border with Bangladesh. It is the primary business, comme ...

United Kingdom

* St Paul's Cathedral in

London London is the capital and List of urban areas in the United Kingdom, largest city of England and the United Kingdom, with a population of just under 9 million. It stands on the River Thames in south-east England at the head of a estuary dow ...

is the place where

s were first discovered by

Lord Rayleigh John William Strutt, 3rd Baron Rayleigh, (; 12 November 1842 – 30 June 1919) was an English mathematician and physicist who made extensive contributions to science. He spent all of his academic career at the University of Cambridge. Am ...

. * The library of

Dollar Academy Dollar Academy, founded in 1818 by John McNabb, is an independent co-educational day and boarding school in Scotland. The open campus occupies a site in the centre of Dollar, Clackmannanshire, at the foot of the Ochil Hills. Overview As of 20 ...

in Scotland. * The entrance gallery of the Aston Webb Great Hall at the

University of Birmingham The University of Birmingham (informally Birmingham University) is a Public university, public research university located in Edgbaston, Birmingham, United Kingdom. It received its royal charter in 1900 as a successor to Queen's College, Birmingha ...

. *

Hamilton Mausoleum Hamilton Mausoleum is a mausoleum located in Hamilton, South Lanarkshire, Scotland. It was the resting place of the family of the Dukes of Hamilton.Hamilton, South Lanarkshire Hamilton ( sco, Hamiltoun; gd, Baile Hamaltan ) is a large town in South Lanarkshire, Scotland. It serves as the main administrative centre of the South Lanarkshire council area. It sits south-east of Glasgow, south-west of Edinburgh and no ...

Scotland Scotland (, ) is a Countries of the United Kingdom, country that is part of the United Kingdom. Covering the northern third of the island of Great Britain, mainland Scotland has a Anglo-Scottish border, border with England to the southeast ...

. * Gloucester Cathedral has a whispering gallery.

United States

The Battle House Hotel The Battle House Renaissance Mobile Hotel & Spa, is a historic hotel in Mobile, Alabama. The current structure was built in 1908 as the Battle House Hotel. It is the second hotel by that name to stand in this location, replacing an earlier Battl ...

in Mobile, Alabama has a whispering arch in the front lobby *

Cincinnati Union Terminal Cincinnati Union Terminal is an intercity train station and museum center in the Queensgate neighborhood of Cincinnati, Ohio. Commonly abbreviated as CUT, or by its Amtrak station code, CIN, the terminal is served by Amtrak's ''Cardinal'' line ...

* The Elijah P. Lovejoy Monument in

Alton, IL Alton ( ) is a city on the Mississippi River in Madison County, Illinois, Madison County, Illinois, United States, about north of St. Louis, St. Louis, Missouri. The population was 25,676 at the 2020 United States Census, 2020 census. It is a p ...

, dedicated to the martyred

abolitionist Abolitionism, or the abolitionist movement, is the movement to end slavery. In Western Europe and the Americas, abolitionism was a historic movement that sought to end the Atlantic slave trade and liberate the enslaved people. The British ...

. * Grand Central Terminal in

New York City New York, often called New York City or NYC, is the most populous city in the United States. With a 2020 population of 8,804,190 distributed over , New York City is also the most densely populated major city in the Un ...

: the gallery in front of the

Oyster Bar An oyster bar, also known as an oyster saloon, oyster house or a raw bar service, is a restaurant specializing in serving oysters, or a section of a restaurant which serves oysters buffet-style. Oysters have been consumed since ancient times and w ...

restaurant * The library inside Hammond Castle Museum in Gloucester, Massachusetts. * The

Mapparium The Mapparium is a three-story-tall globe made of stained glass that is viewed from a bridge through its interior. As of August 2021, it is part of the "How Do You See the World?" exhibit of the Christian Science Publishing Society in Boston, Mas ...

at The Mary Baker Eddy Library in Boston, Massachusetts allows visitors to enter the interior of a reflecting surface forming a nearly complete sphere * A whispering gallery can be found on the main floor of the

Museum of Science and Industry (Chicago) The Museum of Science and Industry (MSI) is a science museum located in Chicago, Illinois, in Jackson Park, in the Hyde Park neighborhood between Lake Michigan and The University of Chicago. It is housed in the former ''Palace of Fine Arts'' fr ...

* Statuary Hall in the

United States Capitol The United States Capitol, often called The Capitol or the Capitol Building, is the seat of the legislative branch of the United States federal government, which is formally known as the United States Congress. It is located on Capitol Hill ...

. *

Salt Lake Tabernacle The Salt Lake Tabernacle, also known as the Mormon Tabernacle, is located on Temple Square in Salt Lake City, in the U.S. state of Utah. The Tabernacle was built from 1863 to 1875 to house meetings for the Church of Jesus Christ of Latter-day Sa ...

Salt Lake City Salt Lake City (often shortened to Salt Lake and abbreviated as SLC) is the capital and most populous city of Utah, United States. It is the seat of Salt Lake County, the most populous county in Utah. With a population of 200,133 in 2020, th ...

Utah Utah ( , ) is a state in the Mountain West subregion of the Western United States. Utah is a landlocked U.S. state bordered to its east by Colorado, to its northeast by Wyoming, to its north by Idaho, to its south by Arizona, and to it ...

* The rotunda at

San Francisco City Hall San Francisco City Hall is the seat of government for the City and County of San Francisco, California. Re-opened in 1915 in its open space area in the city's Civic Center, it is a Beaux-Arts monument to the City Beautiful movement that epitomi ...

. * Curved stone benches on either side of the Smith Memorial Arch in Fairmount Park,

Philadelphia, Pennsylvania Philadelphia, often called Philly, is the largest city in the Commonwealth of Pennsylvania, the sixth-largest city in the U.S., the second-largest city in both the Northeast megalopolis and Mid-Atlantic regions after New York City. Sinc ...

. * Centennial fountain in front of Green Library at Stanford University in

California California is a state in the Western United States, located along the Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the most populous U.S. state and the 3rd largest by area. It is also the m ...

. * The rotunda of the

Texas State Capitol The Texas State Capitol is the capitol and seat of government of the American state of Texas. Located in downtown Austin, Texas, the structure houses the offices and chambers of the Texas Legislature and of the Governor of Texas. Designed in 1881 ...

and the Missouri State Capitol. * Gates Circle,

Buffalo, New York Buffalo is the second-largest city in the U.S. state of New York (behind only New York City) and the seat of Erie County. It is at the eastern end of Lake Erie, at the head of the Niagara River, and is across the Canadian border from Sou ...

. * The Whispering Arch in

St. Louis Union Station St. Louis Union Station is a National Historic Landmark train station in St. Louis, Missouri. At its 1894 opening, the station was the largest in the world that had tracks and passenger service areas all on one level. Traffic peaked at 100,000 ...

Waymarking.com
St. Louis Union Station Whispering Arch
/ref> * Charles Stover Bench, Central Park, New York, New York *

Waldo Hutchins Waldo Hutchins (September 30, 1822 – February 8, 1891) was a New York attorney, businessman and politician. He served in the New York State Assembly and as a Member of Congress. Biography Born in Brooklyn, Connecticut, Hutchins graduated from ...

Bench, Central Park, New York, New York * Center of the Universe, Tulsa, Oklahoma

Other parts of the world

Barossa Reservoir Barossa Reservoir is a reservoir in the Australian state of South Australia, built between 1899 and 1902 to supply water to Gawler and other northern country areas. Built at a cost of almost A£170,000 the reservoir was hailed on completion as a ...

Williamstown, South Australia Williamstown is a small South Australian town on the southern fringe of the Barossa Valley wine-growing region. It is 51 km north east of Adelaide and 16 km south-east of Gawler. Williamstown was originally known as ''Victoria Creek'' ...

. *

Cathedral of Brasília The Cathedral of Brasília (Portuguese: ''Catedral Metropolitana de Brasília'', "Metropolitan Cathedral of Brasília") is the Roman Catholic cathedral serving Brasília, Brazil, and serves as the seat of the Archdiocese of Brasília. It was des ...

Brazil Brazil ( pt, Brasil; ), officially the Federative Republic of Brazil (Portuguese: ), is the largest country in both South America and Latin America. At and with over 217 million people, Brazil is the world's fifth-largest country by area ...

. *

Martello tower Martello towers, sometimes known simply as Martellos, are small defensive forts that were built across the British Empire during the 19th century, from the time of the French Revolutionary Wars onwards. Most were coastal forts. They stand u ...

s. * The Echo Wall in the

Beijing } Beijing ( ; ; ), alternatively romanized as Peking ( ), is the capital of the People's Republic of China. It is the center of power and development of the country. Beijing is the world's most populous national capital city, with over 21 ...

. * Masjed-e Imam in

Esfahān Isfahan ( fa, اصفهان, Esfahân ), from its ancient designation ''Aspadana'' and, later, ''Spahan'' in middle Persian, rendered in English as ''Ispahan'', is a major city in the Greater Isfahan Region, Isfahan Province, Iran. It is lo ...

Iran Iran, officially the Islamic Republic of Iran, and also called Persia, is a country located in Western Asia. It is bordered by Iraq and Turkey to the west, by Azerbaijan and Armenia to the northwest, by the Caspian Sea and Turkmeni ...

. *

Basilica of St. John Lateran The Archbasilica Cathedral of the Most Holy Savior and of Saints John the Baptist and John the Evangelist in the Lateran ( it, Arcibasilica del Santissimo Salvatore e dei Santi Giovanni Battista ed Evangelista in Laterano), also known as the Papa ...

Rome , established_title = Founded , established_date = 753 BC , founder = King Romulus (legendary) , image_map = Map of comune of Rome (metropolitan city of Capital Rome, region Lazio, Italy).svg , map_caption ...

. *

Santa Maria del Fiore Santa Claus, also known as Father Christmas, Saint Nicholas, Saint Nick, Kris Kringle, or simply Santa, is a legendary figure originating in Western Christian culture who is said to bring children gifts during the late evening and overnigh ...

, Florence Cathedral * The Church of the Holy Sepulcher,

Jerusalem Jerusalem (; he, יְרוּשָׁלַיִם ; ar, القُدس ) (combining the Biblical and common usage Arabic names); grc, Ἱερουσαλήμ/Ἰεροσόλυμα, Hierousalḗm/Hierosóluma; hy, Երուսաղեմ, Erusałēm. i ...

. *

Leaning Tower of Nevyansk The Leaning Tower of Nevyansk (russian: Невья́нская ба́шня) is a tower in the town of Nevyansk in Sverdlovsk Oblast, Russia, built in the 18th century. Its construction was funded by Peter the Great's associate Akinfiy ...

, Sverdlovsk Oblast. * Selimiye Mosque in

Edirne Edirne (, ), formerly known as Adrianople or Hadrianopolis ( Greek: Άδριανούπολις), is a city in Turkey, in the northwestern part of the province of Edirne in Eastern Thrace. Situated from the Greek and from the Bulgarian borders ...

Turkey Turkey ( tr, Türkiye ), officially the Republic of Türkiye ( tr, Türkiye Cumhuriyeti, links=no ), is a transcontinental country located mainly on the Anatolian Peninsula in Western Asia, with a small portion on the Balkan Peninsula in ...

. *

St. Peter's Basilica The Papal Basilica of Saint Peter in the Vatican ( it, Basilica Papale di San Pietro in Vaticano), or simply Saint Peter's Basilica ( la, Basilica Sancti Petri), is a church built in the Renaissance style located in Vatican City, the papal e ...

in the

Vatican City Vatican City (), officially the Vatican City State ( it, Stato della Città del Vaticano; la, Status Civitatis Vaticanae),—' * german: Vatikanstadt, cf. '—' (in Austria: ') * pl, Miasto Watykańskie, cf. '—' * pt, Cidade do Vati ...

. * Monument to the Negev Brigade in

Beersheba Beersheba or Beer Sheva, officially Be'er-Sheva ( he, בְּאֵר שֶׁבַע, ''Bəʾēr Ševaʿ'', ; ar, بئر السبع, Biʾr as-Sabʿ, Well of the Oath or Well of the Seven), is the largest city in the Negev desert of southern Israel. ...

Israel Israel (; he, יִשְׂרָאֵל, ; ar, إِسْرَائِيل, ), officially the State of Israel ( he, מְדִינַת יִשְׂרָאֵל, label=none, translit=Medīnat Yīsrāʾēl; ), is a country in Western Asia. It is situated ...

. * The Salle de Cariatides in the

Louvre The Louvre ( ), or the Louvre Museum ( ), is the world's most-visited museum, and an historic landmark in Paris, France. It is the home of some of the best-known works of art, including the ''Mona Lisa'' and the ''Venus de Milo''. A central l ...

Paris Paris () is the Capital city, capital and List of communes in France with over 20,000 inhabitants, most populous city of France, with an estimated population of 2,165,423 residents in 2019 in an area of more than 105 km² (41 sq mi), ma ...

France France (), officially the French Republic ( ), is a country primarily located in Western Europe. It also comprises of overseas regions and territories in the Americas and the Atlantic, Pacific and Indian Oceans. Its metropolitan area ...

. * The

Treasury of Atreus The Treasury of Atreus or Tomb of Agamemnon is a large ''tholos'' or beehive tomb constructed between 1350 and 1250 BC in Mycenae, Greece.Wace, A. J. (1940). The Treasury of Atreus. ''Antiquity, 14'', 233. ISSN 0003-598X The tomb was used for an un ...

Greece Greece,, or , romanized: ', officially the Hellenic Republic, is a country in Southeast Europe. It is situated on the southern tip of the Balkans, and is located at the crossroads of Europe, Asia, and Africa. Greece shares land borders ...

* Secret's Chamber in

El Escorial El Escorial, or the Royal Site of San Lorenzo de El Escorial ( es, Monasterio y Sitio de El Escorial en Madrid), or Monasterio del Escorial (), is a historical residence of the King of Spain located in the town of San Lorenzo de El Escorial, u ...

Madrid Madrid ( , ) is the capital and most populous city of Spain. The city has almost 3.4 million inhabitants and a Madrid metropolitan area, metropolitan area population of approximately 6.7 million. It is the Largest cities of the Europ ...

Spain , image_flag = Bandera de España.svg , image_coat = Escudo de España (mazonado).svg , national_motto = ''Plus ultra'' (Latin)(English: "Further Beyond") , national_anthem = (English: "Royal March") , i ...

. * The Whispering Gallery in the Alhambra in Granada,

. * Cleopatra's Bath in the Siwa Oasis,

Egypt Egypt ( ar, مصر , ), officially the Arab Republic of Egypt, is a transcontinental country spanning the northeast corner of Africa and southwest corner of Asia via a land bridge formed by the Sinai Peninsula. It is bordered by the Medit ...

. *

cave in Syracuse,

Sicily (man) it, Siciliana (woman) , population_note = , population_blank1_title = , population_blank1 = , demographics_type1 = Ethnicity , demographics1_footnotes = , demographi ...

. *

Meštrović Pavilion The Meštrović Pavilion ( hr, Meštrovićev paviljon), also known as the Home of Croatian Artists () and colloquially as the Mosque (), is a cultural venue and the official seat of the Croatian Society of Fine Artists (HDLU) located on the Squ ...

Zagreb, Croatia Zagreb ( , , , ) is the capital and largest city of Croatia. It is in the northwest of the country, along the Sava river, at the southern slopes of the Medvednica mountain. Zagreb stands near the international border between Croatia and Slov ...

Royal BC Museum Founded in 1886, the Royal British Columbia Museum (sometimes referred to as Royal BC Museum) consists of The Province of British Columbia's natural and human history museum as well as the British Columbia Provincial Archives. The museum is loca ...

in Victoria, British Columbia, Canada *

Sacred Heart Cathedral, Wellington The Metropolitan Cathedral of the Sacred Heart and of Saint Mary His Mother, better known as Sacred Heart Cathedral, is a Roman Catholic cathedral on Hill Street, Wellington, New Zealand. It is the parish church of the Thorndon, New Zealand#Chur ...

, New Zealand * The Whispering Arch (Flüsterbogen) in Görlitz,

Germany Germany,, officially the Federal Republic of Germany, is a country in Central Europe. It is the second most populous country in Europe after Russia, and the most populous member state of the European Union. Germany is situated betwe ...

. * Piazza Mercanti, Milan street *Whispering walls, Bologna, Italy

In science

The term ''whispering gallery'' has been borrowed in the physical sciences to describe other forms of

s such as

light Light or visible light is electromagnetic radiation that can be perceived by the human eye. Visible light is usually defined as having wavelengths in the range of 400–700 nanometres (nm), corresponding to frequencies of 750–420 te ...

matter wave Matter waves are a central part of the theory of quantum mechanics, being an example of wave–particle duality. All matter exhibits wave-like behavior. For example, a beam of electrons can be diffracted just like a beam of light or a water wav ...

References

External links

Ear of Dionysius
visiting information, videos and sounds of this cave.
Grand Central Station
visiting information, videos and sounds of the whispering gallery.
St Paul's Cathedral
visiting information, videos and sounds of the whispering gallery. {{portal bar, Architecture Acoustics Rooms

Theory

Examples

India

United Kingdom

United States

Other parts of the world

In science

See also

References

External links