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FR2532806A1
(fr)
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Dispositif servant a convertir un signal electrique en un signal acoustique
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FR2743231A1
(fr)
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Procede et dispositif de diversite de frequence d'une porteuse shf
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US10097929B2
(en)
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Sound signal amplitude suppressing apparatus
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US3449518A
(en)
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Sound reproduction compensation system
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FR2502373A1
(fr)
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Generateur de son audible piezo-electrique
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BE378683A
(cs)
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FR2664445A1
(fr)
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Circuit amplificateur differentiel a faible distorsion et procede d'utilisation.
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US2121150A
(en)
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Tone control system
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US3531596A
(en)
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Treble and bass control circuit
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FR2785471A1
(fr)
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Amplificateur a tubes a ondes progressives
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US2541811A
(en)
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Hearing aid amplifier
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FR2818465A1
(fr)
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Amplificateur compact a gain ajustable
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WO2024116215A1
(en)
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Amplifier for musical instruments
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BE877167A
(fr)
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Systeme d'amplification et d'egalisation de frequences audibles
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Werner
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Loudspeakers and negative impedances |
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Rood
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ART. VIII.--Suggestions for a Telephonic Relay |
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Oksanen et al.
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Digital modeling of the vintage telephone sound |
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BE518704A
(cs)
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FR2834858A1
(fr)
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Dispositif de protection des haut-parleurs contre la distorsion ionique de couplage a l'air (dica)
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US2065774A
(en)
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Electric music transmission
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BE379294A
(cs)
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Kellogg
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The three-electrode vacuum tube as applied to the talking motion picture |
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HK40116348A
(en)
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High-performance audio amplifier
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CH101944A
(fr)
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Dispositif modulateur pour oscillations à hautes fréquences.
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BE437879A
(cs)
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