ReSound, a developer of hearing aid solutions, has launched WindGuard, a dual-microphone signal processing technology that reduces the level of wind noise in hearing devices.
WindGuard consists of two components – a wind detection module and a wind reduction module.
In the detection component, only sounds below 3000 Hz are considered and is minimized by using ReSound’s Surround Sound Processor because low-frequency sound inputs are processed omnidirectionally.
The amount of wind noise with respect to other sounds is calculated across both microphones by correlating the filtered outputs of each microphone.
The wind reduction module’s primary function is to apply gain reduction to specific frequency bands when wind noise is present and greater than 70 dB SPL.