Add to ORKGCommunication presented at the 17th International Congress on Acoustics, Rome, 2-7 September 2001.This paper presents a theoretical and experimental study that shows the presence of a horizontal asymptote of the absorption coefficient function α(f) in relation with the thickness of the sample. This asymptote conduces to the existence of a critical depth, characterized by a certain attenuation of the sound wave, that limits the absorbing properties of the material. Above this thickness, α(f) does not change noticeably and a progressive increase of the layer thickness only means an unnecessary waste of acoustic material.This work has been partially supported by the National Research and Development (R&D) Program within the Project AMB..98-10...
International audienceWe measured the acoustic absorption, in the 0.5–6 kHz frequency range, of poly...
The acoustic absorption coefficient is a number that indicates which fraction of the incident acoust...
The knowledge of the sound field is important in many studies of acoustics. The more boundary condit...
The sound absorption coefficient describes the ability of a porous material to absorb energy. It dep...
It is demonstrated theoretically that the absorptivity of bulk longitudinal waves by an ultra-thin l...
[[abstract]]A simple but accurate analytical acoustic transmission analysis (ATA) is developed for e...
The sound absorption of a porous layer is affected by its thickness, especially in a low-frequency r...
The random incidence sound absorption coefficient is calculated for a narrow strip of absorbing mate...
In acoustics, sound absorption is one of the major definitions and an important factor to be conside...
[EN] We present the conditions to observe perfect sound absorption by rigidly-backed layers of rigid...
The effects of the density and thickness of samples made from used cigarette butts on acoustic chara...
Increasing absorption efficiency and decreasing total thickness of the acoustic absorber is favorabl...
This chapter introduces the principles of sound absorbers and the factors that affect acoustic absor...
The thickness effect in Mössbauer spectroscopy under the excitation of an absorber by an alternating...
Previous calculations of the effective absorption coefficient of a rectangular patch of absorptive m...
International audienceWe measured the acoustic absorption, in the 0.5–6 kHz frequency range, of poly...
The acoustic absorption coefficient is a number that indicates which fraction of the incident acoust...
The knowledge of the sound field is important in many studies of acoustics. The more boundary condit...
The sound absorption coefficient describes the ability of a porous material to absorb energy. It dep...
It is demonstrated theoretically that the absorptivity of bulk longitudinal waves by an ultra-thin l...
[[abstract]]A simple but accurate analytical acoustic transmission analysis (ATA) is developed for e...
The sound absorption of a porous layer is affected by its thickness, especially in a low-frequency r...
The random incidence sound absorption coefficient is calculated for a narrow strip of absorbing mate...
In acoustics, sound absorption is one of the major definitions and an important factor to be conside...
[EN] We present the conditions to observe perfect sound absorption by rigidly-backed layers of rigid...
The effects of the density and thickness of samples made from used cigarette butts on acoustic chara...
Increasing absorption efficiency and decreasing total thickness of the acoustic absorber is favorabl...
This chapter introduces the principles of sound absorbers and the factors that affect acoustic absor...
The thickness effect in Mössbauer spectroscopy under the excitation of an absorber by an alternating...
Previous calculations of the effective absorption coefficient of a rectangular patch of absorptive m...
International audienceWe measured the acoustic absorption, in the 0.5–6 kHz frequency range, of poly...
The acoustic absorption coefficient is a number that indicates which fraction of the incident acoust...
The knowledge of the sound field is important in many studies of acoustics. The more boundary condit...