The concept of self-shielding windows is introduced as an innovative approach to mitigate sound exposure in urban environments. Unlike conventional windows aligned parallel to the building façade, this study examines the sound pressure level exposure at windows oriented obliquely toward the sky. This configuration forces sound from street-level sources to diffract around convex façade elements before reaching the windows, resulting in reduced sound exposure. Additionally, these façade geometries promote a diffuse sound field within the street canyon, diminishing the influence of specular reflections from opposing façades. However, reflections and scattering from higher-positioned elements may offset these benefits by increasing exposure levels. To elucidate the significance of these physical phenomena, scale model experiments were conducted with symmetrical triangular façade elements at varying angles and storey heights. Especially at the higher storeys, significant noise reduction was measured. The experimental findings were further supported by 3D full-wave numerical simulations, capturing the low-frequency dynamics of the sound field.