### Abstract

Analytical models of the sound radiation a rectangular plate are often based on simply supported edges for mathematical convenience. Models for other boundary conditions also exist, but mostly these employ rather complicated analytical calculations. This paper presents an analytical model of the radiation efficiency for a baffled plate using a discrete elementary source model. The model requires only the a knowledge of the spatial distribution vibration velocity of the panel and hence this surface velocity can be calculated conveniently by using the established mobility equations for different plate boundary conditions. This is then included in the discretized Rayleigh integral to calculate the radiated sound pressure to the far-field. Variability of the radiation efficiency for different forcing locations and its average value are presented here for several combinations of boundary conditions. Experimental results are presented for free and clamped edges which show reasonable agreement with the predicted results.

Original language | English |
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Title of host publication | INTERNOISE 2014 - 43rd International Congress on Noise Control Engineering: Improving the World Through Noise Control |

Publisher | Australian Acoustical Society |

ISBN (Print) | 9780909882037 |

Publication status | Published - 2014 |

Event | 43rd International Congress on Noise Control Engineering: Improving the World Through Noise Control, INTERNOISE 2014 - Melbourne Duration: 16 Nov 2014 → 19 Nov 2014 |

### Other

Other | 43rd International Congress on Noise Control Engineering: Improving the World Through Noise Control, INTERNOISE 2014 |
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City | Melbourne |

Period | 16/11/14 → 19/11/14 |

### Fingerprint

### Keywords

- Baffled plate
- Boundary conditions
- Radiation efficiency
- Sound radiation

### ASJC Scopus subject areas

- Acoustics and Ultrasonics

### Cite this

*INTERNOISE 2014 - 43rd International Congress on Noise Control Engineering: Improving the World Through Noise Control*Australian Acoustical Society.

**Modelling sound radiation from a baffled vibrating plate for different boundary conditions using an elementary source technique.** / Putra, Azma; Shyafina, Nurain; Thompson, David; Muhammad, Noryani; Mohd Nor, Mohd. Jailani; Nuawi, Mohd. Zaki.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

*INTERNOISE 2014 - 43rd International Congress on Noise Control Engineering: Improving the World Through Noise Control.*Australian Acoustical Society, 43rd International Congress on Noise Control Engineering: Improving the World Through Noise Control, INTERNOISE 2014, Melbourne, 16/11/14.

}

TY - GEN

T1 - Modelling sound radiation from a baffled vibrating plate for different boundary conditions using an elementary source technique

AU - Putra, Azma

AU - Shyafina, Nurain

AU - Thompson, David

AU - Muhammad, Noryani

AU - Mohd Nor, Mohd. Jailani

AU - Nuawi, Mohd. Zaki

PY - 2014

Y1 - 2014

N2 - Analytical models of the sound radiation a rectangular plate are often based on simply supported edges for mathematical convenience. Models for other boundary conditions also exist, but mostly these employ rather complicated analytical calculations. This paper presents an analytical model of the radiation efficiency for a baffled plate using a discrete elementary source model. The model requires only the a knowledge of the spatial distribution vibration velocity of the panel and hence this surface velocity can be calculated conveniently by using the established mobility equations for different plate boundary conditions. This is then included in the discretized Rayleigh integral to calculate the radiated sound pressure to the far-field. Variability of the radiation efficiency for different forcing locations and its average value are presented here for several combinations of boundary conditions. Experimental results are presented for free and clamped edges which show reasonable agreement with the predicted results.

AB - Analytical models of the sound radiation a rectangular plate are often based on simply supported edges for mathematical convenience. Models for other boundary conditions also exist, but mostly these employ rather complicated analytical calculations. This paper presents an analytical model of the radiation efficiency for a baffled plate using a discrete elementary source model. The model requires only the a knowledge of the spatial distribution vibration velocity of the panel and hence this surface velocity can be calculated conveniently by using the established mobility equations for different plate boundary conditions. This is then included in the discretized Rayleigh integral to calculate the radiated sound pressure to the far-field. Variability of the radiation efficiency for different forcing locations and its average value are presented here for several combinations of boundary conditions. Experimental results are presented for free and clamped edges which show reasonable agreement with the predicted results.

KW - Baffled plate

KW - Boundary conditions

KW - Radiation efficiency

KW - Sound radiation

UR - http://www.scopus.com/inward/record.url?scp=84923548979&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84923548979&partnerID=8YFLogxK

M3 - Conference contribution

AN - SCOPUS:84923548979

SN - 9780909882037

BT - INTERNOISE 2014 - 43rd International Congress on Noise Control Engineering: Improving the World Through Noise Control

PB - Australian Acoustical Society

ER -