US3818149A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prosthetic device for providing corrections of auditory deficiencies in aurally handicapped persons
Assignee: SHALAKO INT
•
Filing: 1973-04-12
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Granted: 1974-06-18
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Expires: 1993-04-12
Abstract
Abstract Electronic circuitry for providing compensatory amplification for aurally handicapped persons. The electronic circuitry divides the audible frequency spectrum into a plurality of adjacent frequency bands through the use of an adjustable filter network to provide compensatory amplification in a prosthetic device in a practical wearable form.
Inventors
- 👤 W Stearns
- 👤 V Blackledge
- 👤 J Rohrer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:10
CPC Classifications
H; H03; H03G; H03G9/00; H03G9/02; H03G9/025; H04; H04R; H04R25/00; H04R25/50; H04R25/502; H04R25/35; H04R25/356
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
160 words
Apparatus for providing compensatory amplification for aurally handicapped persons comprising: input circuit means for receiving signals to be amplified over a selected first and second pass band; flat gain control means coupled with said input circuit means for controlling the amplitude of the signals from said input circuit means over the first pass band; a single filter means coupled to said input circuit means for controlling the amplitude of the signals from said input circuit means over the second pass band; summation means coupled to the outputs of said flat gain control means and said single filter means foR combining the signals from the outputs of said single filter means and said flat gain control means; dual automatic gain control means coupled to the output of said summation means for controlling the overall signal compression and the compression of the signals over the second pass band; and output circuit means coupled with said summation means for receiving the combination signals.
Claim 2
Dependent Claim
160 words
Apparatus for providing compensatory amplification for aurally handicapped persons comprising: input circuit means for receiving signals to be amplified over a selected first and second pass band; flat gain control means coupled with said input circuit means for controlling the amplitude of the signals from said input circuit means over the first pass band; a single filter means coupled to said input circuit means for controlling the amplitude of the signals from said input circuit means over the second pass band; summation means coupled to the outputs of said flat gain control means and said single filter means foR combining the signals from the outputs of said single filter means and said flat gain control means; dual automatic gain control means coupled to the output of said summation means for controlling the overall signal compression and the compression of the signals over the second pass band; and output circuit means coupled with said summation means for receiving the combination signals.
Claim 3
Dependent Claim
29 words
The apparatus as in claim 1 wherein said dual automatic gain control means includes a broadband means coupled to said input circuit means for controlling the overall signals compression.
Claim 4
Dependent Claim
34 words
The apparatus as in claim 1 wherein said dual automatic gain control means includes a narrow-band means coupled to said filter means for controlling the compression of the signals over the second pass band.
Claim 5
Dependent Claim
34 words
The apparatus as in claim 2 wherein said dual automatic gain control means includes a narrow-band means coupled to said filter means for controlling the compression of the signals over the second pass band.
Claim 6
Dependent Claim
17 words
The apparatus as in claim 1 wherein the cut-off frequency of said single filter means is adjustable.
Claim 7
Dependent Claim
20 words
The apparatus as in claim 5 including means for providing gain control coupled with said adjustable frequency single filter means.
Claim 8
Dependent Claim
20 words
The apparatus as in claim 1 wherein separate adjustable automatic gain control means is coupled with said single filter means.
Claim 9
Dependent Claim
40 words
The apparatus as in claim 1 wherein said input circuit means includes a microphone coupled with an amplifier, said amplifier being electrically coupled with the input of said flat gain control means and the input of said single filter means.
Claim 10
Dependent Claim
26 words
The apparatus as in claim 8 wherein said single filter means is adjustable and including means for providing gain control coupled with said adjustable filter means.
Claim 11
Dependent Claim
17 words
The apparatus as in claim 1 wherein said active single filter means is formed of integrated circuits.
Claim 12
Dependent Claim
30 words
The apparatus as in claim 1 including preamplification means coupled to the output of said input circuit means for amplifying the signals from the output of said input circuit means.
Claim 13
Dependent Claim
37 words
The apparatus as in claim 1 including volume control means connected between the output of said summation means and the input of said output circuit means controlling the volume of the combined flat gain and filter signals.
Claim 14
Dependent Claim
24 words
The apparatus as in claim 1 wherein said output circuit means includes receiver means coupled therewith for transducing the combined signals into acoustical signals.
Claim 15
Dependent Claim
15 words
The apparatus as in claim 1 wherein said single filter means includes a highpass filter.
Claim 16
Dependent Claim
15 words
The apparatus as in claim 1 wherein said single filter means includes a bandpass filter.
Claim 17
Dependent Claim
50 words
The apparatus as in claim 1 wherein said summation means includes an operational amplifier having a positive input and a negative input, the output of said flat gain control means being connected to said positive input and the output of said single filter means being connected to said negative input.
Claim 18
Dependent Claim
47 words
The apparatus as in claim 1 wherein said summation means includes an operational amplifier having a positive input and a negative input, said positive input being grounded and the outputs of said flat gain control means and said single filter means being connected to said negative input.
Claim 19
Dependent Claim
31 words
The apparatus as in claim 11 including automatic gain control means connected between the output of said summation means and said preamplifier means for controlling the gain of said preamplifier means.
Claim 20
Dependent Claim
18 words
The apparatus as in claim 11 wherein an automatic gain control means is coupled with said preamplifier means.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-17 | 1977-12-17 | 1978-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-17 | 1981-12-17 | 1982-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-17 | 1985-12-17 | 1986-06-18 | $7700.00 | Window Closed / Lapsed |