A light emitting diode lamp includes a lamp housing formed of a pair of housing members connected to each other in a horizontal direction. The connecting section is circumferentially extended farther than the liquid level of the sample liquid retained in the first reserving cavity. A gain value to be applied to the coded audio signal to generate an estimate of the multiple channel audio signal based on the balance factor and the multiple channel audio signal is determined, with the gain value configured to minimize a distortion value between the multiple channel audio signal and the estimate of the multiple channel audio signal. The launching means and the target body may have a geometry causing that the movement path is substantially vertical or substantially horizontal. The tube comprises a hard second portion disposed on one side of the collar opposite the first portion, said second portion comprising a notch transverse to the axis of the main channel and configured to receive infrared means that can obtain a capnography measurement of the air exhaled through the main channel.