Sound reproducing apparatus accessories

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university, he continued his research in the same field and endeavored to find a way to transmit musical notes and articulate speech. in early , bell visited the famous scientist joseph henry who was then director of the smithsonian institution and asked henry's advice on an electrical multi-reed apparatus

designer and mechanic. bell and watson experimented with acoustic telegraphy in and . on june , watson accidentally plucked one of the reeds and bell at the receiving end of the wire heard the overtones of the reed, overtones that would be necessary for transmitting speech. this led to the "gallows" sound-powered...

https://www.newworldencyclopedia.org/entry/Alexander_Graham_Bell

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second ir illuminator for the irradiation of the second ir light over a second predetermined time period. type: application filed: january , publication date: july , applicant: panasonic i-pro sensing solutions co., ltd. inventors: tatsuya tamaru, satoshi kataoka, daisuke hara, hiroki yamanaka camera apparatus

and capturing control method of camera apparatus publication number: abstract: there is provided a camera apparatus including: a capturing unit that includes a lens to which light, from a capturing area including ir light and visible light is incident, and that performs capturing based on the light;...

https://patents.justia.com/company/panasonic

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fireproof external doors, terrace doors and external doors for unheated rooms, such as sheds or storerooms (model paviljon). fire and soundproof doors are used as exterior doors of hotel rooms and apartments and as separating doors for fire compartments. our fire doors have successfully passed the sound...

https://www.uksetehas.ee/en/products/doors/

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