A vehicle intercom system allows conversation between individuals located, respectively, inside and outside of a vehicle. The mattress includes a plurality of perforated or otherwise porous air cells for supporting the patient’s body weight. However, as concatenation costs, which are measures of the mismatch between sequential pairs of acoustic units, are expensive to compute, processing can be greatly reduced by pre-computing and aching the concatenation costs. In the leadframe, two holders that include two top sides on their two top portions are opposite to one another, and a holder having holes is mounted between these two top sides. The control circuit is connected to the starter motor and the ignition switch. The recording device sends the recorded message based on messaging subscriber attributes retrieved via the data network.