By the "deaf" in the present study is meant that element of the population in which the sense of hearing is either wholly absent or is so slight as to be of no practical value; or in which there is inability to hear and understand spoken language; or in which there exists no real sound perception. In other words, those persons are meant who may be regarded as either totally deaf or practically totally deaf.[1] With such deafness there is not infrequently associated an inability to speak, or to use vocal language. Hence our attention may be said to be directed to that part of the community which, by the want of the sense of hearing and oftentimes also of the power of speech, forms a special and distinct class; and is known, more or less inaccurately, as the "deaf and dumb" or "deaf-mutes" or "mutes."

In our discussion it is with deafness that we are primarily concerned. Deafness and dumbness are, physically, two essentially different things. There is no anatomical connection between the organs of hearing and those of speech; and the structure and functioning of each are such as to preclude any direct pathological relation. The number of the so-called deaf and dumb, moreover, who are really dumb is very small—so small actually as to be negligible. Almost all who are spoken of as deaf and dumb have organs of speech that are quite intact, and are, indeed, constructively perfect. It comes about, however, that dumbness—considered as the want of normal and usual locution—though organically separate from deafness, is a natural consequence of it; and does, as a matter of fact, in most cases to a greater or less extent, accompany or co-exist with it. The reason of this is that the deaf, particularly those who have always been so, being unable to hear, do not know how to use their organs of speech, and especially are unable to modulate their speech by the ear, as the hearing do. If the deaf could regain their hearing, they would have back their speech in short order. The character of the human voice depends thus on the ear to an unrealized degree.

Number of the Deaf in the United States

According to the census of 1900 there were 37,426 persons in the United States enumerated as totally deaf;[2] and according to that of 1910 there were 43,812 enumerated as "deaf and dumb."[3] Hence we may assume that there are between forty and fifty thousand deaf persons in the United States forming a special class.[4]

The following table will give the number of the deaf in the several states and the number per million of population, according to the census of 1910.[5]

NUMBER OF THE DEAF IN THE SEVERAL STATES

No.No. Per
Million of
Population		 No.No. Per
Million of
Population
United States43,812476Montana117311
Alabama807377Nebraska636531
Arizona53259Nevada23281
Arkansas729464New Hampshire191443
California784329New Jersey667263
Colorado243304New Mexico177540
Connecticut332297New York4,760522
Delaware59291North Carolina1,421644
District of Columbia114344North Dakota239414
Florida216286Ohio2,582539
Georgia956366Oklahoma826491
Idaho114349Oregon241359
Illinois2,641468Pennsylvania3,656477
Indiana1,672619Rhode Island208383
Iowa950427South Carolina735485
Kansas934552South Dakota315539
Kentucky1,581690Tennessee1,231563
Louisiana774468Texas1,864478
Maine340458Utah232621
Maryland746576Vermont126354
Massachusetts1,092324Virginia1,120543
Michigan1,315468Washington368323
Minnesota1,077519West Virginia713584
Mississippi737410Wisconsin1,251537
Missouri1,823553Wyoming24159

From this table the largest proportions of the deaf appear to be found in the states rather toward the central part of the country, and the smallest in the states in the far west and the extreme east. The highest proportions occur in Kentucky, North Carolina, Utah, Indiana, West Virginia, Maryland, Tennessee, Missouri, Kansas, Virginia, New Mexico, Ohio, South Dakota, Wisconsin, Nebraska, New York, and Minnesota, all these states having over 500 per million of population. The lowest proportions are found in Wyoming, Arizona, New Jersey, Nevada, Florida, Delaware, Connecticut, Colorado, Montana, Washington, Massachusetts, California, District of Columbia, Idaho, Vermont, Oregon, Alabama, and Rhode Island, in none of these states the number being over 400 per million. Why there should be these differences in the respective proportions of the deaf in the population of the several states, we cannot say; and we are generally unable to determine to what the variations are to be ascribed—whether they are to be set down to particular conditions of morbidity, the intensity of congenital deafness, or other influences operating in different sections; or, perhaps in some measure, to the greater thoroughness with which the census was taken in some places than in others.