This thesis presents a hybrid algorithm for efficient dynamic rendering of room acoustics. To find the optimal perceptual trade-off between resolution and computational efficiency, perceptual listening experiments on the significance of different orders of early reflections were conducted. Based on the findings, a hybrid tool was designed and implemented in JUCE, combining dynamically rendered first-order reflections with convoluted late reverberation. A usability evaluation and a heuristic interview, proved the performance of the designed algorithm to be very effective. Moreover, a signal comparison and a perceptual comparison against a measured room impulse response, proved that while the proposed algorithm shares many attributes with the real room, some differences (possibly from the measurement of the room impulse response) are present.