Rapporten tar upp hur dagens true wireless-teknik fungerar och hur den kan implementeras i separata högtalare. Den förklarar de fundamentala komponenterna som behövs för att konstruera en fungerande trådlös högtalare, sammanfattar överföringstekniken Bluetooth och går in på radarsystem samt tekniken som används i Acconeers radarkomponenter XC112/XR112. Rapporten förklarar specifika komponenter som hörlurarna Urbanista Stockholm och hur dess funktioner kan påverkas från externa källor. Dokumentering i hur installationen samt implementeringen av Raspberry Pi och radarsensorerna går till tas även upp i rapporten. I arbetet har geststyrning implementerats i ena högtalaren med hjälp av radarsensorer för att kontrollera funktionerna som hörlurarna har inbyggt. Hörlurarna kommunicerar med en uppspelningsenhet via Bluetooth, vanligtvis en mobiltelefon. De funktioner som används är att byta låt, ändra volym och pausa/spela musiken. Eftersom de olika hörlurarna kontrollerar olika funktioner har en 433Hz radiosändare används för att kunna skicka över specifika kommandon till andra högtalaren. Resultatet av arbetet visar att true wireless-tekniken kan implementeras väl i separata högtalare, med hjälp av Acconeers radarsensorer kunde olika gester registreras och kommandon skickas till hörlurarna. För att gester ska registreras krävs specifika avstånd och rätt hastighet på svepet med handen. Kommunikationen med radiosändaren blev instabil och behövdes både placeras rätt och justeras för att fungera. När väl kommunikationen med radiomodulerna fungerade så utfördes kommandona på den andra hörluren korrekt. / This report explains how today's true wireless technology works and how it could be implemented in separate speakers. It explains the fundamental components needed to design a working wireless speaker, summarizes the Bluetooth transmission technology and goes into radar systems as well as the technology used in Acconer's radar components XC112/XR112. Furthermore, the report goes into specific components such as the Urbanista Stockholm headphones and how its functions can be controlled from external sources. Documentation on how the installation as well as implementation of the Raspberry Pi and the radar sensors works is also included in the report. With the work, gesture control has been implemented in one of the speakers with the help of radar sensors to control the functions that the headphones have built-in. The headphones communicate with a playback device via Bluetooth, usually a mobile phone. The functions are changing songs, adjusting volume and pausing/playing the music. Because the different headphones control different functions, a 433Hz radio transmitter has been used to be able to transmit specific commands to the other speaker. The results of the work show that true wireless technology can be well implemented in separate speakers, with help of Acconeer’s radar sensors, different gestures could be registered and commands sent to the headphones. In order for the gestures to be registered, specific distances and the correct speed of the sweep are required. The communication between the radio transmitter and receiver became unstable and needed to be placed correctly and adjusted to work. Once the communication worked the commands were executed correctly by the other headphone.

This study examines how a user-centered approach can influence product design to reduce physical discomfort when using in-ear true wireless. The given study is a collaboration with the consumer electronics company Zound Industries. The purpose has been to understand the origins of why physical discomfort can arise when using in-ear true wireless headphones and to what extent the user behaviour plays in it all. Previous studies have shown how physical discomfort in the form of eczema, itching and soreness has been caused by the use of in-ear true wireless. Based on user-centered methods such as expert interviews, cultural probes, user interviews, focus groups, this study has been able to identify not only how, but why physical discomfort can occur when using in-ear true wireless. Furthermore, the study has also been able to identify behavioural patterns among users that reveal how headphones are used for purposes other than what they are intended for. It has been possible to show how users use their headphones like an earplug without music to block out sound in order to be able focus or to communicate they don’t want to be disturbed to avoid social interactions. The conducted knowledge and insights provide a better understanding of how design can be used to enhance the experience of using in-ear true wireless headphones. Applying design strategies within design for behavioural change, an adjustable headphone has been developed that allows the user to use the headphone according to the needs of the user. The study provides a basis for how design can be better utilised in future in-ear true wireless headphones.