## Abstract

Formulas are presented for acoustical quantities of a harmonically excited resilient, at, circular loudspeaker in an infinite baffle. These quantities are the sound pressure on-axis, far-field, directivity, and the total radiated power. These quantities are obtained by expanding the velocity distribution in terms of orthogonal polynomials. For rigid and non-rigid radiators, this yields explicit, series expressions for both the on-axis and far-field pressure. In the reverse direction, a method of estimating velocity distributions from (measured) on-axis pressures by matching in terms of expansion coefficients is described. Together with the forward far-field computation scheme, this yields a method for assessment of loudspeakers in the far-field and of the total radiated power from (relatively near-field) on-axis data (generalized Keele scheme).

Original language | English |
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Title of host publication | 126th Audio Engineering Society Convention 2009 |

Pages | 48-59 |

Number of pages | 12 |

Volume | 1 |

Publication status | Published - 1 Dec 2009 |

Event | 126th Convention of the Audio Engineering Society (AES 2009 Convention) - Munich, Germany Duration: 7 May 2009 → 10 May 2009 Conference number: 126 |

### Conference

Conference | 126th Convention of the Audio Engineering Society (AES 2009 Convention) |
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Abbreviated title | AES Convention 2009 |

Country | Germany |

City | Munich |

Period | 7/05/09 → 10/05/09 |