Whispering gallery 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 are the Gol Gumbaz mausoleum in Bijapur and the Echo Wall of the Temple of Heaven 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
Whispering campaign Whispering campaign A whispering campaign or whisper campaign is a method of persuasion in which damaging rumors or innuendo are spread about the target, while the source of the rumors seeks to avoid being detected while spreading them (for example, a political campaign might distribute anonymous flyers attacking the other candidate). It is generally considered unethical in open societies, particularly in matters of public policy. The speed and anonymity of communication made possible by modern technologies like the Internet has increased public awareness of whisper campaigns and their ability to succeed. This phenomenon has also led to the failure of