TRANSMITTER

PURPOSE:To collect the voice of a speaker under noisy environment clearly and accurately by providing an vibration pickup converting a mechanical vibration in a hard part into an electric signal. CONSTITUTION:An vibration pickup is provided at the location connectable to a head part 2 in a helmet 3 as a head covering put on the head 2. An inner pad 7 is arranged so as to keep the space between the head 2 and the helmet 3 and protect the head 2. The inner pad 7 is made of, for example, light sponging agent such as styrene foam. In this case, the vibration pickup 1 is a converter converting the mechanical vibration into an electric signal, and used, for example, for an piezoelectric conversion element. Further, the vibration pickup 1 is installed on the hard part of the head part 2, which means the part directly connectable to the skeleton.