The RF noise removal function cuts unpleasant noise introduced in audio equipment when receiving wireless phone calls – without the need for additional components or external counter-measures. Sound leakage is prevented when power supplies, which are attached to an external power amp (BD37034FV), are turned OFF to only 1/30th. Additional features include technology used to eliminate noise in the low-frequency region that cannot be reproduced through simulation, and a switching operationwhich minimises popping noises generated when adjusting the volume and/or tone for smooth, natural audio transition.
Digital and analog are the usual two methods for performing volume and tone adjustment in sound processors. With digital systems, however, there is concern over essential sound quality degradation caused by bit drops during volume attenuation, making analog the preferred method. ROHM has used its analog expertise to lead the industry in high fidelity sound processor development. With the increased demand for higher sound quality in audio devices and systems, alongside the widespread usage of mobile phones, it is much more important to minimize RF noise when receiving incoming calls. The devices fulfill this demand with features like the RF noise removal function for audio equipment that cuts noise generated by incoming phone calls, along with the audio leakage prevention function.