GB600336A - Improved electrical means for indicating sound pitch or voice inflection - Google Patents
Improved electrical means for indicating sound pitch or voice inflectionInfo
- Publication number
- GB600336A GB600336A GB2310045A GB2310045A GB600336A GB 600336 A GB600336 A GB 600336A GB 2310045 A GB2310045 A GB 2310045A GB 2310045 A GB2310045 A GB 2310045A GB 600336 A GB600336 A GB 600336A
- Authority
- GB
- United Kingdom
- Prior art keywords
- harmonic
- reeds
- reed
- amplifier
- filters
- 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
Links
- 235000014676 Phragmites communis Nutrition 0.000 abstract 18
- 244000273256 Phragmites communis Species 0.000 abstract 10
- 210000003813 thumb Anatomy 0.000 abstract 3
- 210000003811 finger Anatomy 0.000 abstract 2
- 210000001747 pupil Anatomy 0.000 abstract 2
- 206010011878 Deafness Diseases 0.000 abstract 1
- 230000003321 amplification Effects 0.000 abstract 1
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 230000000881 depressing effect Effects 0.000 abstract 1
- 230000000994 depressogenic effect Effects 0.000 abstract 1
- 238000005259 measurement Methods 0.000 abstract 1
- 238000003199 nucleic acid amplification method Methods 0.000 abstract 1
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
- G10L25/00—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
- G10L25/90—Pitch determination of speech signals
Landscapes
- Engineering & Computer Science (AREA)
- Computational Linguistics (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)
- Rehabilitation Tools (AREA)
Abstract
600,336. Frequency measurements. HORVITCH, G. M. Sept. 7, 1945, No. 23100. [Class 37] [Also in Group XV] A pitch or inflection indicator, particularly for speech training of deaf and dumb persons, comprises means for converting sound or voice vibrations into electronic signals of corresponding frequency with a series of filters each passing a signal of predetermined frequency, and a series of devices each operative by a signal of predetermined frequency and each adapted to vibrate or depress a particular key or reed to indicate the signal. The indicator comprises a master amplifier and distribution network 1, the input to which is fed through an amplifier 2, coupling transformer 3, and amplifier 4 to a transformer 5 having two outputs 6, 7. The output 6 feeds a sound intensity indicator 8 and a slow speed wave form analyser 9. Eight identical reed circuits 10 corresponding to the notes of an octave are provided, one being shown in detail enclosed in chain-dotted lines. Each reed circuit comprises an amplifier 11, a frequency selector and amplifier 12, a volume expanded amplifier 13 having a low frequency voltage to actuate the reed, and first and second harmonic selectors and reed actuators 14, 15. The selector valve 16 selects a single note in the filters 17, the first harmonic of that note in the filters 18, and the second harmonic in the filters 19. These three notes are rectified in the rectifier 20 and control the amplification of the amplifier 21, which emits a frequency capable of best being conveyed by the reed 22. The valve 20 also feeds amplifiers 23, 24 so that the filters 25 resonate to the first harmonic of the note generated and the filters 26 to the second harmonic. Rectifiers 27, 28 feed relays 29, 30 which depress the first harmonic reed 36 or the second harmonic reed 38. In order to enable frequencies to be generated by depressing the reeds, a generator 40 is provided for each of the reeds 22. Condensers 41, 42 change the frequency to the first or second harmonic when the first or second harmonic reeds 36, 38 are depressed. The indicator is controlled by means of a six-pole nine-point ganged master switch 46 connected to a class line 60 and a microphone line 61. An automatic switch'selector control 59 is coupled to the master switch 46 and feeds an automatic selector line 65 so that on operation of the master switch on one pitch indicator (e.g. the teacher's) the master switches on all the other indicators in the circuit take up appropriate positions. Microphones 63, 64 are connected to the master switch 46 as shown. By setting the master switch to different positions the teacher may instruct a class with or without using his own set, a pupil may examine his own speech or generate notes on his reeds and examine their characteristics, the teacher may generate notes on his reeds and the class examine their characteristics, or the teacher may instruct through amplifier only without using his reeds. The pupils place four fingers of each hand on the eight reeds covering the notes of the basic octave, the two thumbs being placed on the harmonic reeds, vibration of the reeds being transmitted to the fingers. The first and second harmonics are indicated by the separate thumbs, and the third harmonic may be indicated by simultaneous vibration of both reeds touching the thumbs. Harmonics may alternatively be indicated by lamps.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR914770T | 1945-09-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB600336A true GB600336A (en) | 1948-04-06 |
Family
ID=9422436
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2310045A Expired GB600336A (en) | 1945-09-24 | 1945-09-07 | Improved electrical means for indicating sound pitch or voice inflection |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR914770A (en) |
GB (1) | GB600336A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DK151419B (en) * | 1975-01-24 | 1987-11-30 | Laryngograph Ltd | CLUTCH FOR DETECTING AND REPRESENTING THE SPEECH PUBLIC |
-
1945
- 1945-09-07 GB GB2310045A patent/GB600336A/en not_active Expired
- 1945-09-24 FR FR914770D patent/FR914770A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DK151419B (en) * | 1975-01-24 | 1987-11-30 | Laryngograph Ltd | CLUTCH FOR DETECTING AND REPRESENTING THE SPEECH PUBLIC |
Also Published As
Publication number | Publication date |
---|---|
FR914770A (en) | 1946-10-17 |
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