This paper proposes an adaptive howling canceller using notch filter and 2-tap linear predictor, where howling consists of a single sinusoidal signal whose magnitude is much greater than other frequency’s magnitudes....This paper proposes an adaptive howling canceller using notch filter and 2-tap linear predictor, where howling consists of a single sinusoidal signal whose magnitude is much greater than other frequency’s magnitudes. The employed 2-tap linear predictor can quickly detect howling due to its high convergence speed. Although the output signal of the 2-tap linear predictor cannot be directly used as one of a howling canceller, we can obtain the frequency of howling from the filter coefficient. We utilize the filter coefficient of the 2-tap linear predictor to design a notch filter which achieves a very narrow elimination band. The designed notch filter removes only howling and retains other desired signals. Simulation results show that the proposed adaptive howling canceller can quickly detect and effectively remove howling.展开更多
In the 1950s,McCarthyism,characterized by anti-Communist and anti-foreign policy,was rampant throughout the United States of America.The public recitation of the poem“Howl”marks the beginning of the Beats’rebellion...In the 1950s,McCarthyism,characterized by anti-Communist and anti-foreign policy,was rampant throughout the United States of America.The public recitation of the poem“Howl”marks the beginning of the Beats’rebellion against McCarthyism.As a successful poetry-movie,the film Howl bridged the gap between vision and hearing through a series of diversified presentation forms,such as documentary reenactments,archival photos,and the reconstruction of court trial scenes,thus breaking the boundary between poetry and film.As a kind of displaying the authorship of Ginsberg,the close-up pictures of typewriters repeatedly appear in the film to vividly interpret the Beat writers’style of spontaneous composition.展开更多
文摘This paper proposes an adaptive howling canceller using notch filter and 2-tap linear predictor, where howling consists of a single sinusoidal signal whose magnitude is much greater than other frequency’s magnitudes. The employed 2-tap linear predictor can quickly detect howling due to its high convergence speed. Although the output signal of the 2-tap linear predictor cannot be directly used as one of a howling canceller, we can obtain the frequency of howling from the filter coefficient. We utilize the filter coefficient of the 2-tap linear predictor to design a notch filter which achieves a very narrow elimination band. The designed notch filter removes only howling and retains other desired signals. Simulation results show that the proposed adaptive howling canceller can quickly detect and effectively remove howling.
基金Supported by the projectof National Social Science Foundation of China“Comparative Study on the Postmodernity of Beat Poetry and‘Third Generation’Poetry”(Project No.21FWWB006)and“A Study on the Translation of Children’s Literature During the May 4th Movement(1917-1927)”(Project No.18FWW010)the key project of Sichuan Foreign Language and Literature Research Center“Research on the Anti-Text Writing of the Beats in the Context of McCarthyism”(Project No.SCWY21-01)+2 种基金the project of American Research Center of Southwest Jiaotong University“A Study on Anti-Text Writing of Beats Writers”(Project No.ARC2021005)the project of Sichuan higher education on the talents training and the reform of teaching quality“An Innovation Research on English Normal Students Training Under the Strategy of‘One Belt and One Road’”(Project No.JG2021-1363)the project of SASU first-class course“A Survey of English and American Literature”(Project No.2020KCB024)。
文摘In the 1950s,McCarthyism,characterized by anti-Communist and anti-foreign policy,was rampant throughout the United States of America.The public recitation of the poem“Howl”marks the beginning of the Beats’rebellion against McCarthyism.As a successful poetry-movie,the film Howl bridged the gap between vision and hearing through a series of diversified presentation forms,such as documentary reenactments,archival photos,and the reconstruction of court trial scenes,thus breaking the boundary between poetry and film.As a kind of displaying the authorship of Ginsberg,the close-up pictures of typewriters repeatedly appear in the film to vividly interpret the Beat writers’style of spontaneous composition.
