# Immersive Two-Channel Recordings Based on Personalized BRIRs and Their Applications in Industry
## 7 Conclusions  
Immersive two-channel recordings based on personalized binaural room impulse responses (BRIRs) represent a significant advancement in the realm of audio technology, having profound implications across various industries. Immersive sound, characterized by its ability to envelop the listener and create a sense of presence within an auditory environment, is significantly enhanced by personalized BRIRs. These customized filters leverage the unique anatomical features of individual listeners, allowing for precise spatial audio reproduction of acoustic experiences in any given room. This personalization is crucial for achieving a high level of externalization, where sounds are perceived as emanating from the external environment as a whole or precise virtual sound sources rather than from inside the listener's head. The externalization effect is vital for creating realistic and believable audio experiences, which are essential in applications requiring spatial accuracy and immersion. The methods of rendering two-channel immersive recordings, whether through traditional techniques, advanced high-order ambisonics (HOA), or just using personalized BRIRs as the base, are pivotal in achieving these effects. In the entertainment industry, such as virtual reality (VR), augmented reality (AR), and extended reality (XR), the integration of personalized BRIRs elevates user immersion by providing a more authentic and engaging auditory environment. This enhancement is critical for creating believable virtual worlds where spatial audio cues contribute significantly to the sense of presence and realism. In the professional domain, such as teleconferencing and remote work, personalized BRIRs can improve communication by providing spatial audio that makes conversations more natural and engaging. This technology can help mitigate the common issues of conventional audio setups, where participants' voices might overlap or sound flat. By placing voices in a spatial context, meetings can feel more like in-person interactions, improving understanding and reducing cognitive difficulties. New codecs able to handle spatial audio metadata and create binaural renderings using headphone reproduction, including head-tracking, scene rotation, reverberation, and support of external customized HRTFs, still have some room for improvement. Tests conducted with already-existing applications and ones that use only BRIRs would be a great starting point in learning the real difference that additional RIRs could contribute to the immersive experience. Integrating immersive sound into hearing aid devices represents a significant leap forward in auditory assistance. Personalized BRIRs enhance user experience through advanced sound processing and spatial audio rendering, providing accurate spatial cues that improve speech understanding in complex environments. This technology promises to deliver better auditory capabilities for everyone and can be tailored to individual needs, making it particularly beneficial for every hearing-enabling and -supporting device. Additionally, combining virtual sound environments with personalized BRIRs can offer even greater acoustic realism, ensuring that users perceive sound in a way that closely mirrors natural hearing they would have. This advancement enables them to engage more fully with their surroundings in a safe and unique way. A proposed approach for future research would be to obtain personalized HRIRs of every person, stored, e.g., in a way that biometric data are, with every HRIR set assigned to one individual. HRIRs could be registered in a designed anechoic space with multiple loudspeakers in the way they normally are. To create true BRIRs, it remains in the authors' hands to create a database of a number of rooms or venues with their own acoustic characteristics and, what is most important, directional clues.