A living room for the evaluation of multiple auditory scenes
Typ
Examensarbete för masterexamen
Program
Sound and vibration (MPSOV), MSc
Publicerad
2020
Författare
Chrysovalantis Roumpakis, Nikolaos
Modellbyggare
Tidskriftstitel
ISSN
Volymtitel
Utgivare
Sammanfattning
The subjective evaluation of sound, demands adequate environments where, listening
tests can be carried out. As the presence of multi modal stimuli always influences
the perception of sound, there are two main solutions to handle this influence in an
appropriate way. External stimuli beside the auditory stimuli could be eliminated as
far as possible (e.g. dark rooms) or one creates environments close to the environment
of interest. During autumn 2017, the transmission lab at Applied Acoustics has been
redesigned as to two listening rooms. While one of the both will be used as standard
listening room, the second is intended for research that concerns people in their home
environment. Therefore, it was designed to resemble a living room, in which subjects
are going to be exposed to varying auditory scenes.
The MSc thesis will mainly focus in the documentation of the acoustic properties of the
two laboratories, with a greater focus in the second room, relating to the intended research.
In more detail, since very low frequencies will be used in order to simulate some
of the auditory scenes, their acoustic properties need to be adequately documented in
that region, in order for the researchers to be able to properly adjust their experiments.
Moreover, the electro-acoustic equipment featured in the rooms, will be measured. For
these purposes, two methods for impulse response extraction will be examined, in order
to provide a first insight in the properties of the acoustic systems involved. Finally,
by using these impulse responses, the reverberation times of both rooms will be estimated,
as well as their behavior in the low frequency region.
Summarizing, the goal of the MSc thesis is the documentation of the aforementioned
listening rooms, their featured equipment and the corresponding methodology used in
the measurements.
Beskrivning
Ämne/nyckelord
room acoustics, building acoustics, acoustics measurements, impulse response, listening room, loudspeakers, spectral decay, modal reverberation time