抄録
The Tokyo Municipal Elementary School for Water-faring Families has an unusually great number of children with definitely husky voices. The authors carried out otorhinolaryngological examinations, especially laryngeal examinations, on 125 children of the school of ages from 6 to 12 years and got some findings usually considered as prodromes of the so-called mutation, but many children had stronger changes in color and shape than usual in the larynx, especially in the vocal cords. There were found many that had lost the normal of the vocal cords and been clouded in various ways.
As for the cause of these husky voices, it was experimentally proved in some degree that there is less reverberation and the communication is disturbed by the wind and they are compelled to resort to excessive vocalization on the barges on which they live. It is considered also that the effect of the sea wind cannot be neglected.
