Samsung has revealed how its new Galaxy Buds4 Pro aims to improve voice call quality, outlining a combination of new hardware and AI-driven software designed to make conversations clearer in noisy environments.
At the heart of the earbuds is what Samsung calls Sensor Fusion technology. Instead of relying on a single microphone, the Galaxy Buds4 Pro combines data from three microphones and a Voice Pickup Unit (VPU) based on bone-conduction technology. While the two external microphones capture the user’s voice, the internal microphone and VPU detect speech transmitted through the user’s body and head vibrations, allowing the earbuds to better distinguish speech from surrounding noise.
Samsung says the captured data is processed by a Deep Neural Network (DNN) that reconstructs the user’s voice while suppressing background sounds. According to the company, the AI model has been optimised for on-device processing, reducing its computational requirements to around 10% of the original workload and shrinking the model size by roughly 70% without sacrificing performance.
The company also claims the updated algorithm captures up to 16 times more vocal detail than previous generations, while continuously compensating for “fit leakage” caused by earbuds shifting during use. This is achieved by analysing signals from the internal and external microphones in real time and adjusting the audio processing accordingly.
When paired with a compatible Galaxy smartphone, the Galaxy Buds4 Pro also supports a 16 kHz Super Wideband (SWB) connection, which Samsung says delivers more natural-sounding voice calls.
To validate its claims, Samsung says it tested the earbuds in both laboratory conditions using wind simulators and in real-world environments such as cafés, department stores, train stations, moving vehicles, and outdoor locations with varying levels of ambient noise.
