Sound pressure level limits for stage machinery noise in operas and theaters

Melnikov, Anton; Witew, Ingo B.; Maeder, Marcus; Gatt, Monika; Scheffler, Michael; Marburg, Steffen

doi:10.1016/j.apacoust.2019.06.022

Cited by 3 publications

(1 citation statement)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The optimal perception of sound is a clear perception of any change in tonal quality made by the performer [9]. The indoor comfort of a theatre is related to several aspects such as optimal sound perception, adequate lighting [10], optimal thermo-hygrometric conditions [11], good positioning, and comfortable seating [12]. Although it has been shown that the architectural configuration of concert halls affects the overall acoustic perception of listeners, it has been found that experienced listeners are able to assess sound quality regardless of the visual and architectural configuration of the hall [13].…”

Section: Introductionmentioning

confidence: 99%

Experimental Characterization and Acoustic Correction of a Multipurpose Performance Hall: The Italian Theatre “Cavallino Bianco”

et al. 2022

View full text Add to dashboard Cite

This study presents the retrofit acoustic design of the Italian theatre “Cavallino Bianco”. In its historical configuration, the hall had a curved roof with a pressed-plant fiber ceiling, which was demolished and replaced with a wooden roof without a false ceiling, leading to an increase in volume and worsening of the reverberation time. This study proposes the realization of a wave ceiling and the application of sound-absorbing and reflecting panels on the walls, which have already been implemented. These modifications have affected the acoustic characterization of the theatre, as shown both through on-site measurements during the main construction phases and through numerical simulations. The reverberation time, clarity index, and speech transmission index (STI) are evaluated considering all the variations in the hall during its different construction times, and the optimal solution is identified with regard to different specific uses. The final configuration, by reducing the volume of the hall and using sound-absorbing materials, significantly reduces the reverberation time. In addition, the hall at full capacity with chairs and people shows evident improvement to the clarity index, allowing the theatre to be used for a wide range of musical genres such as instrumental, symphonic, and opera.

show abstract

Section: Introductionmentioning

confidence: 99%

Experimental Characterization and Acoustic Correction of a Multipurpose Performance Hall: The Italian Theatre “Cavallino Bianco”

et al. 2022

View full text Add to dashboard Cite

show abstract

Optimizing duct geometry for micro-scale VAWTs: Exploring aerodynamics and aeroacoustics with URANS and DDES models

Rahmatian,

Khaksar,

Tari

et al. 2024

Energy

View full text Add to dashboard Cite

Acoustic metamaterial capsule for reduction of stage machinery noise

Melnikov

Maeder

Friedrich

et al. 2020

The Journal of the Acoustical Society of America

View full text Add to dashboard Cite

Noise mitigation of stage machinery can be quite demanding and requires innovative solutions. In this work, an acoustic metamaterial capsule is proposed to reduce the noise emission of several stage machinery drive trains, while still allowing the ventilation required for cooling. The metamaterial capsule consists of c-shape meta-atoms, which have a simple structure that facilitates manufacturing. Two different metamaterial capsules are designed, simulated, manufactured, and experimentally validated that utilize an ultra-sparse and air-permeable reflective meta-grating. Both designs demonstrate transmission loss peaks that effectively suppress gear mesh noise or other narrow band noise sources. The ventilation by natural convection was numerically verified, and was shown to give adequate cooling, whereas a conventional sound capsule would lead to overheating. The noise spectra of three common stage machinery drive trains are numerically modelled, enabling one to design meta-gratings and determine their noise suppression performance. The results fulfill the stringent stage machinery noise limits, highlighting the benefit of using metamaterial capsules of simple c-shape structure.

show abstract

Sound pressure level limits for stage machinery noise in operas and theaters

Cited by 3 publications

References 24 publications

Experimental Characterization and Acoustic Correction of a Multipurpose Performance Hall: The Italian Theatre “Cavallino Bianco”

Experimental Characterization and Acoustic Correction of a Multipurpose Performance Hall: The Italian Theatre “Cavallino Bianco”

Optimizing duct geometry for micro-scale VAWTs: Exploring aerodynamics and aeroacoustics with URANS and DDES models

Acoustic metamaterial capsule for reduction of stage machinery noise

Contact Info

Product

Resources

About