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Biomedical subjects

W Schlorhaufer

Publications and source records attributed to W Schlorhaufer.

At least 19 recordsLinked to original sources
PubMed1982

[Disturbed auditive perception (author's transl)].

Disturbed auditive perception on its own, but even more frequently combined with other partly decreased cerebral functions is almost regularly found in children with speech disorders. They must be recognized and treated along with speech therapy. A report on the difficulties in comprehending this perception deficit neurophysiologically as well as on recent models of categorial hearing of speech is given. In practice such disturbances become relevant if speech disorders appear along with normal audiometric results. The exact observation of such children indicates the existence of disturbed auditive perception: Confusing of words of similar sound, constant asking for repetition, difficult acquisition of local-adverbs, missing of parts in a series of instructions and others.

Auditory Perceptual Disorders↗
PubMed1978

[The treatment of psychogenic aphonia in two adolescents (author's transl)].

Psychogenic aphonia is rare in childhood and adolescence and its management is therefore problematic. Two examples, one of a hypofunctional aphonia in a 14 year old with a stutter and another of psychogenic aphonia confirm the necessity after psychiatric assessment and treatment of speech therapy in order to restore the voice to normal. The place of the laryngologist and speech therapist is discussed.

Adolescent↗
PubMed1976

[A female mutational falsetto? (author's transl)].

This paper reports about a female mutational falsetto, that means an unusual high (309 Hz base frequency) fundamental frequency of the speaking voice in a 19-year-old girl. The psychological background and the epicrisis as well as the practical negative result of the hormon- and metabolism examination allow the diagnosis of this rare disturbance of the voice, the formal classification of which would on the other hand also allow the statement of a phononeurosis with a too high fundamental frequency of the speaking voice because the behavior of the voice from the menarche (12 years) up to the first examination does not seem assured definately. The individual median fundamental frequency of the speaking voice has inally been obtained at 270 Hz. Energy range of the speaking voice has been measured, glottography and sonagraphy has been carried out, all of which show the course of treatment clearly. It has been remarked critically that there has to be found a method to better reproduce the hearing impression in a figure. Investigations according to this have been made.

Adult↗
PubMed1975

[Whistler for two voices (sound of whistle produced by man) (author's transl)].

"Double tone whistling" is the rare ability to produce two different tones of whistle with the mouth at the same time and with volitional intervalls between two tones: melodies being whistled this way sound therefore as two voices. With two persons who have this ability we could tape several melodies, analyse them and conclude from this the origin of the two single tones. Beside that we also could analyse a case of "tripletone" melodies and compare it with the results of our sonogramms. The recordings were analysed with the AF-spectrum-analyser Songraph 6061 B. From the interpretation of the patterns follows: In nearly all cases there is a "switching over" between two tones (see Figs. 1, 4, 5). The intervall between the two tones is not fixed but harmonic. Listening to this gives the impression of tremolo. One of our persons could even continue whistling are tone after the change over to the other tone for a short time (about 50 msec). You get the impression of "switching over" even when only listening to the recording of the double-tone whistling of person 2. As mentioned above, we were able to analyse the "melodies for three voices" as indicated by Scheminzky (1957). "Double tone whistling" and independent humming at a lower frequency form this three voices of the "three voice melody". In opposition to Scheminzky's conjecture, a changing over and not a continuous side by side of the two single tones is the basis of this "doubletone whistling". The results of our analysis are: Person 1 seems to be able to form two resonant rooms in the mouth cavity with the tongue with two resonance frequencies. Person 2 could indicate two kinds of whistle at two voices: a) The tongue is being moved forth and back in the rhythm of the switching over. b) The tongue is being fixed and the cheeks change the shape of the mouth-cavity in the rhythm of the change over.

Acoustics↗