Acoustic quality of auditoria: Relationship between acoustical energy parameters and subjective perception

The acoustic design auditoria is founded on objective acoustic parameters determined on the basis of the computed or measured impulse response. Such objective parameters are related on the average response of the human ear to transient sounds, without considering the subjective perception of the individual, which, in turn, is related also to social and education aspects. The aim of this study is to investigate the relationship between individual sound perceptions and energy parameters. In detail, a questionnaire has been submitted to a sample of people listening to tracks of different musical genres. The questionnaire has been conceived to come up with a classification model for the audience allowing to express the listener's experience according to different indicators, such as overall acoustic quality and overall acoustic experience. Results of this experiment are analyzed by means of Random Forest non-parametric model belonging to the data mining algorithms. The final purpose of the study is to define which physical and acoustical characteristics are the most suitable to represent the subjective perceptions of the listeners

Stress test and regulatory disclosure

LAUREA MAGISTRALEIn the aftermath of the financial crisis, regulators and policy makers have called for improved corporate transparency, mainly through significant changes to regulations and disclosure requirements. In particular, since the 2007-2009 financial crisis, stress tests have become an integral part of macroprudential regulation in the U.S. and Europe with the goal to strengthen the resilience of the financial system and ensure that financial institutions have sufficient capital. There isn’t an agreement on whether the stress test results should be disclosed: there are positive implications but also negative externalities arising from it. With a focus on the European Economic Area, the aim of this work is to show if the information disclosed in 2014 and 2016 through the Asset Quality Review and the Stress Tests had a significant impact on the stock value and on the balance sheet of the banks taking part to the different disclosure events. Through a fixed-effect econometrical analysis, it will be shown that the significance of balance sheet variables such as Loans over Assets, Return on Equity or Price to Book Value changes considerably for banks who took place to the disclosure events with respect to banks who did not.In the aftermath of the financial crisis, regulators and policy makers have called for improved corporate transparency, mainly through significant changes to regulations and disclosure requirements. In particular, since the 2007-2009 financial crisis, stress tests have become an integral part of macroprudential regulation in the U.S. and Europe with the goal to strengthen the resilience of the financial system and ensure that financial institutions have sufficient capital. There isn’t an agreement on whether the stress test results should be disclosed: there are positive implications but also negative externalities arising from it. With a focus on the European Economic Area, the aim of this work is to show if the information disclosed in 2014 and 2016 through the Asset Quality Review and the Stress Tests had a significant impact on the stock value and on the balance sheet of the banks taking part to the different disclosure events. Through a fixed-effect econometrical analysis, it will be shown that the significance of balance sheet variables such as Loans over Assets, Return on Equity or Price to Book Value changes considerably for banks who took place to the disclosure events with respect to banks who did not

Acoustic quality of auditoria: Relationship between acoustical energy parameters and subjective perception

The acoustic design auditoria is founded on objective acoustic parameters determined on the basis of the computed or measured impulse response. Such objective parameters are related on the average response of the human ear to transient sounds, without considering the subjective perception of the individual, which, in turn, is related also to social and education aspects. The aim of this study is to investigate the relationship between individual sound perceptions and energy parameters. In detail, a questionnaire has been submitted to a sample of people listening to tracks of different musical genres. The questionnaire has been conceived to come up with a classification model for the audience allowing to express the listener's experience according to different indicators, such as overall acoustic quality and overall acoustic experience. Results of this experiment are analyzed by means of Random Forest non-parametric model belonging to the data mining algorithms. The final purpose of the study is to define which physical and acoustical characteristics are the most suitable to represent the subjective perceptions of the listener