Audio-visual preferences, perception, and use of water features in open-plan offices

Psychological and physiological effects of soundscapes: A systematic review of 25 experiments in the English and Chinese literature

The aim of this systematic review was to conduct a comprehensive and rigorous investigation of both psychological and physiological responses to, and audio-visual interactions with, soundscapes to present an overview of the current status and to provide suggestions for future research. Our literature search focused on empirical and quantitative studies of journal articles and gray literature in English and Chinese. This systematic review excluded literature related to pure music, religious sounds, humanistic sounds, historical sounds, medical research, and differences in materials used. The Joanna Briggs Institute's Checklist for Randomized Controlled Trials was used to assess the risk of bias in the included studies. Twenty-five studies were included, involving 1950 participants. The major findings of this systematic review were that: (1) there were significant associations between the psychological and physiological responses; (2) the audio-visual interaction affected the psychological and physiological responses; and (3) because of the high risk of bias of the included studies, interpretation of their findings should be cautious. Nevertheless, given that this systematic review has a higher level of evidence than a single study and the synthesized evidence identified in this review is aligned with the results of other studies, the studies reviewed herein together provide consistent evidence. Replications are important in empirical research to build trustworthy results. Future research should focus on the psychological responses of pleasantness, preference, tranquility, the eight semantic dimensions (ISO 12913-2:2018), and the 11 pairs of adjectives describing the soundscape (Ba et al., 2023) and the physiological responses of heart rate variability and salivary, and follow the CONSORT guidelines to improve the research quality. An integration of sensory modalities, environmental factors, contextual indicators, temporal data, demographic variables, socio-cultural factors, and psychological and physiological responses may provide deeper insights into how people experience and understand the acoustic environment in context.

Virtual reality and immersive technologies to promote workplace wellbeing: a systematic review

BACKGROUND

Work-related stress negatively impacts employee wellbeing. Stress-management interventions that reduce workplace stress can be challenging. Immersive technologies, such as virtual reality (VR), may provide an alternative.

AIMS

This systematic review aimed to evaluate feasibility, acceptability, and effectiveness of immersive technologies to promote workplace wellbeing (PROSPERO 268460).

METHODS

Databases MEDLINE, Web of Science, PsycINFO and Embase were searched until 22nd July 2021. Studies were included if they tested a workforce or were designed for a workplace. Effective Public Health Practice Project quality assessment tool (EPHPP) was used for quality ratings.

RESULTS

There were 17 studies (N = 1270), published 2011-2021. Over half were conducted in Europe. Eight studies were controlled trials. Most studies involved brief, single sessions of immersive VR and provided evidence of feasibility, acceptability, and effectiveness when measuring wellbeing-related variables such as stress, relaxation, and restoration. VR environments included relaxation tasks such as meditation or breathing exercises, and nature-based stimuli, such as forests, beaches, and water. Studies tested office workers, healthcare professionals, social workers, teachers, and military personnel. EPHPP ratings were "strong" (N = 1), "moderate" (N = 13), and "weak" (N = 3).

CONCLUSIONS

VR relaxation appears helpful for workplaces. However, limited longer-term data, controlled trials, and naturalistic studies mean conclusions must be drawn cautiously.

The interactive effects of traffic sound and window views on indoor soundscape perceptions in the residential area

Environmental noise has long been considered one of the unwelcome aspects of urban life at home. An increasing number of scholars have studied improving indoor acoustic comfort by using the soundscape approach. However, much uncertainty still exists about the relationship between the audio-visual environment and indoor soundscape perception. The current study investigates the interaction effects of traffic sound and window views on indoor soundscape perceptions in residential contexts. Thirty-two participants were presented with 51 scenarios (a combination of 17 window views and three aural stimuli) and requested to assess their soundscape perceptions in a VR experiment. Results showed that traffic noise could moderate the impact of nature, road, and building views on pleasantness, while it can also moderate the effect of water sound and road view on eventfulness. In particular, natural window views were found not to lead to a more pleasant indoor soundscape necessarily; natural window views even decrease the pleasantness of indoor soundscape in the case of heavy traffic noise outside the window. Besides, overall visual indicators, including complexity and openness, have an interactive effect with traffic sound on pleasantness. Last, pleasantness is found to be associated with the appropriateness of indoor soundscape.

Audiovisual Bimodal and Interactive Effects for Soundscape Design of the Indoor Environments: A Systematic Review

A growing number of soundscape studies involving audiovisual factors have been conducted; however, their bimodal and interactive effects on indoor soundscape evaluations have not yet been thoroughly reviewed. The overarching goal of this systematic review was to develop the framework for designing sustainable indoor soundscapes by focusing on audiovisual factors and relations. A search for individual studies was conducted through three databases and search engines: Scopus, Web of Science, and PubMed. Based on the qualitative reviews of the selected thirty papers, a framework of indoor soundscape evaluation concerning visual and audiovisual indicators was proposed. Overall, the greenery factor was the most important visual variable, followed by the water features and moderating noise annoyance perceived by occupants in given indoor environments. The presence of visual information and sound-source visibility would moderate perceived noise annoyance and influence other audio-related perceptions. Furthermore, sound sources would impact multiple perceptual responses (audio, visual, cognitive, and emotional perceptions) related to the overall soundscape experiences when certain visual factors are interactively involved. The proposed framework highlights the potential use of the bimodality and interactivity of the audiovisual factors for designing indoor sound environments in more effective ways.

Ecological Validity of Immersive Virtual Reality (IVR) Techniques for the Perception of Urban Sound Environments

Immersive Virtual Reality (IVR) is a simulated technology used to deliver multisensory information to people under different environmental conditions. When IVR is generally applied in urban planning and soundscape research, it reveals attractive possibilities for the assessment of urban sound environments with higher immersion for human participation. In virtual sound environments, various topics and measures are designed to collect subjective responses from participants under simulated laboratory conditions. Soundscape or noise assessment studies during virtual experiences adopt an evaluation approach similar to in situ methods. This paper aims to review the approaches that are utilized to assess the ecological validity of IVR for the perception of urban sound environments and the necessary technologies during audio–visual reproduction to establish a dynamic IVR experience that ensures ecological validity. The review shows that, through the use of laboratory tests including subjective response surveys, cognitive performance tests and physiological responses, the ecological validity of IVR can be assessed for the perception of urban sound environments. The reproduction system with head-tracking functions synchronizing spatial audio and visual stimuli (e.g., head-mounted displays (HMDs) with first-order Ambisonics (FOA)-tracked binaural playback) represents the prevailing trend to achieve high ecological validity. These studies potentially contribute to the outcomes of a normalized evaluation framework for subjective soundscape and noise assessments in virtual environments.

Acoustics for Supportive and Healthy Buildings: Emerging Themes on Indoor Soundscape Research

The focus of the building industry and research is shifting from delivering satisfactory spaces to going beyond what is merely acceptable with a wave of new research and practice dedicated to exploring how the built environment can support task performance and enhance people’s health and well-being. The present study addresses the role of acoustics in this paradigm shift. Indoor soundscape research has recently emerged as an approach that brings a perceptual perspective on building and room acoustics in order to shape built environments that “sound good” according to building occupants’ preference and needs. This paper establishes an initial discussion over some of the open questions in this field of research that is still in an embryonic stage. A thematic analysis of structured interviews with a panel of experts offered a range of perspectives on the characterization, management, and design of indoor soundscapes and health-related outcomes. The discussion pointed out the importance of both perceptual and multisensory research and integrated participatory design practices to enable a holistic view regarding the complex building–user interrelations and the design of just cities. Soundscape methodologies tailored to the peculiarities of indoor soundscapes can help to measure and predict the human perceptual response to the acoustic stimuli in context, thus reducing the risk of mismatches between expected and real building experiences. This perceptual perspective is expected to widen the scientific evidence for the negative and positive impacts of the acoustic environment on human health, well-being, and quality of life. This will support prioritizing the role of acoustics in building design and challenge many current design practices that are based on a noise control approach.