A communications radio has an IF stage with an associated filter array. Provided by the invention are the seeds, plants and derivatives of the soybean variety D5632454. The H2S alarm methods are particularly useful for ensuring the safety of workers at remote worksites. The flange is perpendicular to the body, and is attached to a bottom edge thereof. Noise coming from the base unit may be redirected by the structure toward the resonance chambers, which are configured to attenuate the noise.