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FR2416610A2 - Hearing aid signal correction device - has transistor collector-emitter shunt resistor to reduce transfer resistance and increase input signal range - Google Patents

Hearing aid signal correction device - has transistor collector-emitter shunt resistor to reduce transfer resistance and increase input signal range

Info

Publication number
FR2416610A2
FR2416610A2 FR7803309A FR7803309A FR2416610A2 FR 2416610 A2 FR2416610 A2 FR 2416610A2 FR 7803309 A FR7803309 A FR 7803309A FR 7803309 A FR7803309 A FR 7803309A FR 2416610 A2 FR2416610 A2 FR 2416610A2
Authority
FR
France
Prior art keywords
hearing aid
transfer resistance
input signal
correction device
shunt resistor
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.)
Granted
Application number
FR7803309A
Other languages
French (fr)
Other versions
FR2416610B2 (en
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.)
AUDIBEL
Original Assignee
AUDIBEL
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 AUDIBEL filed Critical AUDIBEL
Priority to FR7803309A priority Critical patent/FR2416610A2/en
Publication of FR2416610A2 publication Critical patent/FR2416610A2/en
Application granted granted Critical
Publication of FR2416610B2 publication Critical patent/FR2416610B2/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G7/00—Volume compression or expansion in amplifiers
    • H03G7/002—Volume compression or expansion in amplifiers in untuned or low-frequency amplifiers, e.g. audio amplifiers
    • H03G7/004—Volume compression or expansion in amplifiers in untuned or low-frequency amplifiers, e.g. audio amplifiers using continuously variable impedance devices
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3005—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers
    • H03G3/301—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers the gain being continuously variable
    • H03G3/3015—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers the gain being continuously variable using diodes or transistors
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
    • H04R25/35—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception using translation techniques
    • H04R25/356—Amplitude, e.g. amplitude shift or compression
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
    • H04R25/50—Customised settings for obtaining desired overall acoustical characteristics
    • H04R25/502—Customised settings for obtaining desired overall acoustical characteristics using analog signal processing

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Neurosurgery (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)

Abstract

The hearing aid has two capacitance (7,8) a transistor (2) and an amplifier (3) connected in series with an input microphone and output (6). Negative feedback is applied from an output resistor (5) to the base of the transistor. A resistor is connected across the emitter and collector of the transistor to shunt the transfer resistance of the transistor. This allows an increase in the dynamic range of input signal without an increase in distortion of output. The input level for saturation increases from 85dB to 100dB.
FR7803309A 1978-02-07 1978-02-07 Hearing aid signal correction device - has transistor collector-emitter shunt resistor to reduce transfer resistance and increase input signal range Granted FR2416610A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7803309A FR2416610A2 (en) 1978-02-07 1978-02-07 Hearing aid signal correction device - has transistor collector-emitter shunt resistor to reduce transfer resistance and increase input signal range

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7803309A FR2416610A2 (en) 1978-02-07 1978-02-07 Hearing aid signal correction device - has transistor collector-emitter shunt resistor to reduce transfer resistance and increase input signal range

Publications (2)

Publication Number Publication Date
FR2416610A2 true FR2416610A2 (en) 1979-08-31
FR2416610B2 FR2416610B2 (en) 1983-04-08

Family

ID=9204267

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7803309A Granted FR2416610A2 (en) 1978-02-07 1978-02-07 Hearing aid signal correction device - has transistor collector-emitter shunt resistor to reduce transfer resistance and increase input signal range

Country Status (1)

Country Link
FR (1) FR2416610A2 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1161002A (en) * 1966-02-21 1969-08-13 Royal Industries Improvements in and relating to Hearing Aids
DE2452998A1 (en) * 1973-11-21 1975-05-22 Viennatone Hoergeraete HOE EQUIPMENT

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1161002A (en) * 1966-02-21 1969-08-13 Royal Industries Improvements in and relating to Hearing Aids
DE2452998A1 (en) * 1973-11-21 1975-05-22 Viennatone Hoergeraete HOE EQUIPMENT

Also Published As

Publication number Publication date
FR2416610B2 (en) 1983-04-08

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