US707909A - Sound-modifier. - Google Patents

Description

Patented Aug. 26, I902.

N. C DURAND. SUND MODIFIER.

{Application led June 14, 1902.) (No Modal;)

NTED STATES PATENT FFICE.

NELSON C. DURAND, OF SORANTON, PENNSYLVANIA, ASSIGNORTO INTER- NATIONAL TEXT BOCK COMPANY, OF SCRANTON, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

SOUND-MODlFIER.

SPECIFICATEON formig part of Letters Patent No. 707,909, dated August 26, 1902.

Application filed June 14:, 1902. Serial No. 111,678. (No model.)

T all wh0m it may 7w07%: To the end stated my invention consists of Be it known that I, NELSON C. DURAND, a asound-modifier,ashereinafterdescribed and oitizen of the United States,residingat Soranclaimed.

ton, in the county of Lackawanna and State The invention is illustrated in the accomof Pennsylvania, have invented new and usepanyingdrawings, t0 whioh reference is made ful Improvements in Sound Modifiers, of in the followiug description, and in which which the following is a specification. Figure 1 of the drawings illustrates in per- My invention relates to sound-modifiers, spective a sound-conveyer tube snob as orand has for its object to provide a new and dinarilyused in connection With phonographs 10 useful and economical device for modifying and commonly known as a hearing-tube, sonnd in its transmission to the ear, which is provided withasound-escape according to my particularly useful in connection With the invention. Fig. 2 is a similar view showing sound-conveying tubes of phonographs, but the sound-conveyer adjusted to close the may be found useful in other relations. sonnd-escape. Fig. 3 shows the same con- I5 In the practical use of phonographs the voyer adjusted t0 permit the escape of sound sonnd delivered to the ear of the hearer is and illustrating the regulable character of often harsh and not clearly distinguishable, thesound-escape. Fig. 4 is a detached view especially in the transmission of recorded of the sonnd-modifier proper. speech. This is oaused, I beiieve, to some In the said drawings the reference-nu- 20 extent by the fact that the sound of the runmeral 1 indicates a sonnd-conveyer tube of ning instrument is, together With the reaphonographic instrument commonly termed corded sound-waves, passed into the sounda hearing-tube. Asound-escape 2,whichI conveyer or hearing-tube. This harshness term a sonnd-modifier, that admits of the and confusion of sound is perhaps more proescape of a portion of the volume of sonnd- 25 nounced where the sonnd-records of the phowaves passing through the hearing-tube,is in nograph are deep or loud, as where they are the illustrated example of my invention inprepared in such manner that they may be terposed in a sonnd-conveyer at a point beused at one time in connection With a horn, tween the sound-receiving and sound-deliverthe sound being delivered into the open air ing parts of said convoyer. The remaining 30 to be heard by a nnmoer of listeners, and at volume of sonnd passes to the ear of the lisanother timeinconneotion withahearingtube tener in a modified or modulated form and is where the sound is confined and conveyed delivered to the ear of the listener in a very through a sonnd-convoyer or hearing-tube to clear and distinct way. an individual listener, who places the sonnd- The sound-conveyer consists of a perfo- 35 deliverer element of the tube t0 bis ear. rated tube 3, over Whi0h fit meeting ends l Where the sound is transmitted through a of a divided hearing-tube 1, the ends 1 of hearing-tube to the car of the listener, the which are capable of being brought together harshness of the sound delivered and its conto meet and close the soundescape or put the fused and not clearly-distinguishable quality sonnd-modifier out of operation, as in Fig. 2,

40 is moreespecially observed in the transmis as may be desirable when the greatest amouut 0 sion of speech from the record, where it is deof sound is to be conveyed. The ends 1 of sirable that each word shall be transmitted the convoyer are capable also of beingmoved clearly and distinctly to the listener. away from eaoh other on the perforated tube By my invention the objections stated are to expose a greater or less surface thereof,

5 obviated, and as ancillary my sonnd-modifier whereby the sonnd-escape or modifier may ce 5 is capable of being regulated or adjusted, as regulated t0 permit the escape of a greater or will be described, t0 permit the escape of a less volume of sound-waves to meet the varygreater or less volume of sound, as may be ing characteristics of the hearing sense of necessary to meet the varying characteristics individual listeners.

50 0E hearing of different individuals. My improved sonnd-convoyer is of such a eharaeter, as will be apparent, that it ean be readily applied to existng sound-conveyer tubes by mere1y severing the latter and interposing the perforated tube and is of a very 5 simple and economieal nature.

Havng thus described my invention, what I claim is- A 1. The combnation of a dvided soumiconveyer, and a perforated tube interposed 1o therein.

2. In eombination with a divided soundconveyer, a perforated tube interposed therein, sad conveyer beng adjustable on said tube t0 regu1ate the escape of sound from the conveyer.

In testimony whereof I have hereunto set my hand in presence of two subserbing Witnasses.

NELSON C. DURAND.

Witnesses:

CLAUDE U. KRAUSE, DAVID COUTE.

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