A footwear construction including an articulated welt. The route of the snowplow may be tracked continuously which allows the snow depth of the street to be reset in real-time. A ramp generating module receives the selected clock signal and generates a ramp signal. The composite tube may be made of a light-weight, fiber-reinforced composite. In the handset provided with a casing : a bone conduction speaker is housed in an upper portion of the casing ; a microphone is housed in a lower portion of the casing ; and, a sound aperture of a microphone portion of the casing, in which portion the microphone is housed, is formed in a bottom surface of the casing andor a lower end side surface of the casing. The second amplification characteristic is formed in dependence on the mean input level such that amplification is increased with respect to first amplification characteristic in a predefined level interval below the mean input level.