GB473128A - Improved apparatus for analysing sound waves or electric oscillations comprising a band of frequencies - Google Patents

Improved apparatus for analysing sound waves or electric oscillations comprising a band of frequencies

Info

Publication number
GB473128A
GB473128A GB653236A GB653236A GB473128A GB 473128 A GB473128 A GB 473128A GB 653236 A GB653236 A GB 653236A GB 653236 A GB653236 A GB 653236A GB 473128 A GB473128 A GB 473128A
Authority
GB
United Kingdom
Prior art keywords
armatures
magnet
slot
sound waves
individual
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB653236A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to GB653236A priority Critical patent/GB473128A/en
Publication of GB473128A publication Critical patent/GB473128A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
    • G10L21/06—Transformation of speech into a non-audible representation, e.g. speech visualisation or speech processing for tactile aids

Landscapes

  • Engineering & Computer Science (AREA)
  • Data Mining & Analysis (AREA)
  • Computational Linguistics (AREA)
  • Quality & Reliability (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)

Abstract

473,128. Optical sound - recording apparatus; audible - signalling apparatus. WALTON, G. W. March 4, 1936, No. 6532. [Classes 40 (ii) and 118 (ii)] [Also in Groups XXXVI and XL] A device for analyzing electric oscillations or sound waves comprises a plurality of magnetic circuits in parallel, separate armatures associated with the individual circuits being mounted for free vibration about a common axis in such a way that their mounting depends entirely on the presence of the flux, and the reluctance of the individual circuits being different so that the armatures have different natural periods of vibration and may respond to the component frequencies of the oscillations being analyzed. In one embodiment, sound waves are introduced by a horn 10 into the upper portion of a cylindrical magnet 1 divided by a partition 8 ending in a knife edge 3 on which a plurality of identical armatures 4 are pivotally held by the magnet. The pole faces 2 of the magnet diverge slightly so that the air gaps 6 vary along the length of the magnet whereby the armatures have different periods of vibration and resonate with the individual frequencies of the sound wave. The various frequency components of the sound waves are recorded on a continuously moving photographic film 15 by a light source 11, which projects the image of a stop 18 in a slot 17 through a lens 12 on to a slot 14 the light being reflected in its path by the faces 7 of the individual armatures. Normally, no light passes through the slot 14, but when an armature 4 vibrates the corresponding portion of the image moves from coincidence with the slot, and the oscillation is recorded on the film by a line parallel to the movement thereof the density of which is proportional to the amplitude of the oscillation, in a manner similar to that described in Specification 412,206. The armatures 4 may vary in mass progressively and so be arranged to oscillate with equal amplitudes when the analyzed frequency components have equal energy. Electric oscillations to be analyzed are applied to a coil 21, Fig. 3, on a branch of the magnet 1.
GB653236A 1936-03-04 1936-03-04 Improved apparatus for analysing sound waves or electric oscillations comprising a band of frequencies Expired GB473128A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB653236A GB473128A (en) 1936-03-04 1936-03-04 Improved apparatus for analysing sound waves or electric oscillations comprising a band of frequencies

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB653236A GB473128A (en) 1936-03-04 1936-03-04 Improved apparatus for analysing sound waves or electric oscillations comprising a band of frequencies

Publications (1)

Publication Number Publication Date
GB473128A true GB473128A (en) 1937-10-04

Family

ID=9816214

Family Applications (1)

Application Number Title Priority Date Filing Date
GB653236A Expired GB473128A (en) 1936-03-04 1936-03-04 Improved apparatus for analysing sound waves or electric oscillations comprising a band of frequencies

Country Status (1)

Country Link
GB (1) GB473128A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105788591A (en) * 2014-10-15 2016-07-20 现代自动车株式会社 Apparatus And Method For Recognizing Horn Using Sound Signal Processor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105788591A (en) * 2014-10-15 2016-07-20 现代自动车株式会社 Apparatus And Method For Recognizing Horn Using Sound Signal Processor

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