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A text-book of experimental psychology.On auditory sensations (concluded).

A text-book of experimental psychology.: On auditory sensations (concluded). Combination Tones.—When two different tones, not too closely similar in pitch, are sounded simultaneously, "combination tones" are heard in addition to the two primary tones. They are localised within the ear. Combination tones are of two kinds, "summation tones" and "difference tones." The former can only be heard with great difficulty; but their existence, although from time to time denied, has been unquestionably proved by means of appropriate resonators. The pitch of the summation tone corresponds to the sum of the vibration frequencies of the two primary tones. The pitch of the difference tone, which even the unpractised may hear without difficulty (experiments 33-35), corresponds to the difference of these frequencies. Variation Tones.—Tones of like pitch and of like formation are also produced when l is no longer a series of disturbing sound waves, but consists of a number of simple interruptions applied to h. Interruption Tones.— According to the most recent views, either of these two variation tones may produce a difference tone with the primary tone. At all events, a tone may undoubtedly be heard, under suitable conditions, which has the pitch l (= h+l–h , or h–h–l). This latter tone is called the "interruption tone," its pitch coinciding with the number of interruptions given per second to the primary tone. The Relation of Tones.—If various pairs of successively sounding tones be compared (exp. 37), a closer relation and an easier transition will be found between the members of some pairs than between those of others. The tone nearest related to a given tone will prove to be the octave or any multiple of the octave. determine the pitch of a given tone by observing the interval between it and a previously given tone the pitch of which is already known. Or we may be able to determine the pitch absolutely, without reference to any other tone. The absolute determination of pitch is then dependent on a close association between each tone and its alphabetical name. When the tone is sounded, its name immediately appears in consciousness. (PsycInfo Database Record (c) 2023 APA, all rights reserved) http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png

A text-book of experimental psychology.On auditory sensations (concluded).

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Publisher
Longmans, Green and Co
Copyright
Copyright © 1909 American Psychological Association
Pages
42 –62
DOI
10.1037/13628-004
Publisher site
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Abstract

Combination Tones.—When two different tones, not too closely similar in pitch, are sounded simultaneously, "combination tones" are heard in addition to the two primary tones. They are localised within the ear. Combination tones are of two kinds, "summation tones" and "difference tones." The former can only be heard with great difficulty; but their existence, although from time to time denied, has been unquestionably proved by means of appropriate resonators. The pitch of the summation tone corresponds to the sum of the vibration frequencies of the two primary tones. The pitch of the difference tone, which even the unpractised may hear without difficulty (experiments 33-35), corresponds to the difference of these frequencies. Variation Tones.—Tones of like pitch and of like formation are also produced when l is no longer a series of disturbing sound waves, but consists of a number of simple interruptions applied to h. Interruption Tones.— According to the most recent views, either of these two variation tones may produce a difference tone with the primary tone. At all events, a tone may undoubtedly be heard, under suitable conditions, which has the pitch l (= h+l–h , or h–h–l). This latter tone is called the "interruption tone," its pitch coinciding with the number of interruptions given per second to the primary tone. The Relation of Tones.—If various pairs of successively sounding tones be compared (exp. 37), a closer relation and an easier transition will be found between the members of some pairs than between those of others. The tone nearest related to a given tone will prove to be the octave or any multiple of the octave. determine the pitch of a given tone by observing the interval between it and a previously given tone the pitch of which is already known. Or we may be able to determine the pitch absolutely, without reference to any other tone. The absolute determination of pitch is then dependent on a close association between each tone and its alphabetical name. When the tone is sounded, its name immediately appears in consciousness. (PsycInfo Database Record (c) 2023 APA, all rights reserved)

Published: Feb 13, 2012

Keywords: combination tones; summation tones; variation tones; difference tones; interruption tones; vibration frequencies; sound waves; pitch; sound frequency; Helmholtz; theory of hearing

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