FR2376483A1 - Electronic signalling unit for producing bird calls - has two oscillators and loudspeaker to imitate bird song, by producing bursts of sound - Google Patents

Electronic signalling unit for producing bird calls - has two oscillators and loudspeaker to imitate bird song, by producing bursts of sound

Info

Publication number
FR2376483A1
FR2376483A1 FR7639222A FR7639222A FR2376483A1 FR 2376483 A1 FR2376483 A1 FR 2376483A1 FR 7639222 A FR7639222 A FR 7639222A FR 7639222 A FR7639222 A FR 7639222A FR 2376483 A1 FR2376483 A1 FR 2376483A1
Authority
FR
France
Prior art keywords
producing
bird
oscillator
loudspeaker
sound
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.)
Withdrawn
Application number
FR7639222A
Other languages
French (fr)
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.)
KIRMIZIYAN HRACA
Original Assignee
KIRMIZIYAN HRACA
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 KIRMIZIYAN HRACA filed Critical KIRMIZIYAN HRACA
Priority to FR7639222A priority Critical patent/FR2376483A1/en
Publication of FR2376483A1 publication Critical patent/FR2376483A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K15/00—Acoustics not otherwise provided for
    • G10K15/02—Synthesis of acoustic waves

Abstract

An electronic unit is used to imitate the song of birds. It can be used as a warning device for road vehicle or at the beginning or an announcement by loud-speaker (HP). The unit has a supply rectifier with a diode (D) and a capacitor (C). It also has a low frequency oscillator and a very low frequency oscillator. The second oscillator modulates the low frequency signal of the first oscillator. A loud-speaker is used to transmit repetitive bird sounds. The first oscillator has a transistor with feedback. The second oscillator uses the same transistor in a relaxation circuit. Regular bursts of sound may be emitted by the loudspeaker.
FR7639222A 1976-12-28 1976-12-28 Electronic signalling unit for producing bird calls - has two oscillators and loudspeaker to imitate bird song, by producing bursts of sound Withdrawn FR2376483A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7639222A FR2376483A1 (en) 1976-12-28 1976-12-28 Electronic signalling unit for producing bird calls - has two oscillators and loudspeaker to imitate bird song, by producing bursts of sound

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7639222A FR2376483A1 (en) 1976-12-28 1976-12-28 Electronic signalling unit for producing bird calls - has two oscillators and loudspeaker to imitate bird song, by producing bursts of sound

Publications (1)

Publication Number Publication Date
FR2376483A1 true FR2376483A1 (en) 1978-07-28

Family

ID=9181594

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7639222A Withdrawn FR2376483A1 (en) 1976-12-28 1976-12-28 Electronic signalling unit for producing bird calls - has two oscillators and loudspeaker to imitate bird song, by producing bursts of sound

Country Status (1)

Country Link
FR (1) FR2376483A1 (en)

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Legal Events

Date Code Title Description
ST Notification of lapse