Lyd på Bjerget

Vi besøger to af de steder på Aarhus Universitet, hvor man arbejder med lyd. De ligger lidt nordvest for Universitetsparken med de gule bygninger, nemlig på Katrinebjerg.

På den ene side af Finlandsgade har vi Institut for Elektro- og Computerteknologi, og på den anden side finder vi en del af Institut for Kommunikation og Kultur. Vi besøger begge to og kommer til at høre to spændende indlæg og kommer ind i laboratorierne. DAS sørger for lidt frugt og drikkevarer.

Deltagelse er gratis for DAS-medlemmer.

Hvis man ikke er medlem af DAS koster deltagelse 200 kr., som betales via MobilePay – brug boks 1430CL eller QR-koden: https://qr.mobilepay.dk/box/9c7e5bff-738a-4382-a21b-4313c997b751/pay-in

Dagens program:

• Sissel Raahede Lundgaard, ph.d.-stud., afd. f. Digital Design og Informationsvidenskab, Institut for Kommunikation og Kultur: Practical investigations of sonic citizenship
• Anna Sergeeva, postdoc, Center for Ear-EEG, Institut for Elektro- og Computerteknologi: From Clinic to Real World: Hearing Assessment with Ear-EEG
• Besøg i laboratorierne på begge sider af gaden. Udgangspunktet er Finlandsgade 22, bygning 5125, som er fire etager høj, hvid med gule glasfelter.

English: The intended language for this event is Danish but we will switch to English if desired.

Appetitvækkere til de to oplæg (på engelsk, men begge oplægsholdere taler dansk):

Sissel Raahede Lundgaard: Practical investigations of sonic citizenship

There is growing international interest in how sound environments affect health and well-being, amongst other reflected in efforts to establish ISO standards that promote interdisciplinary approaches for data collection and analysis of the perception of acoustic environments. The soundscape approach, as defined in the ISO 12913 series, marks a shift from a negative, noise-centric perspective to one centered on quality-of-life.

Building on this, we further emphasize the need for a community-oriented shift — one that goes beyond approaching sonic life through individual perception and recognizes listening as a socially and culturally dependent practice. Through the concept of sonic citizenship, we call for deeper investigations into how we audibly participate in and connect with our surroundings. We put forward questions of how sound shapes our sense of belonging, safety, and participation — our sonic citizenship.

These questions are central to our research and have in practice been explored through intervention studies working to implement multi-sensory birthing rooms and enhancing the sound environment in nursing homes. In both projects, the environmental changes not only altered the perception of the spaces but also triggered broader cultural transformations. These outcomes suggest that implementing soundscape design influence not just how spaces are experienced, but how they function socially — revealing the profound role of sound in shaping communal life.

Anna Sergeeva: From Clinic to Real World: Hearing Assessment with Ear-EEG

Hearing aid fitting is traditionally carried out in clinical settings, where behavioral tests are used to estimate hearing threshold levels (HTLs). These thresholds determine the gain applied by the hearing aid across different audiometric frequencies. The auditory steady-state response (ASSR)—a brain response to modulated sounds—offers an objective alternative for HTL estimation. However, like behavioral tests, ASSR recordings have typically been limited to clinical environments.

Ear-EEG is a technique that records brain signals from electrodes placed inside the ear, enabling portable, user-friendly, brain-based hearing assessments outside the clinic.

This presentation shows results from a series of research studies conducted at the Center for Ear-EEG, focusing on hearing assessment based on ear-EEG. These include investigations into how stimulus bandwidth influences ASSR detectability and how spatial filtering methods can improve the signal-to-noise ratio.
In the context of threshold estimation, we demonstrate that naturalistic stimuli — such as continuous speech — can replace synthetic tones for estimating HTLs using ASSR. Finally, we explore the potential of ASSR to assess more complex auditory functions such as auditory masking.