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|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||179/15 ; M ; 181/153 ; 181/199 ; 179/1AA|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 30 인용 특허 : 0|
Masking sound generating apparatus for use in a conventional room enclosure occupied by adult persons of average range of heights comprising a hollow enclosure having a top opening and a side opening, a speaker mounted inside the enclosure intermediate the top opening and the side opening and facing outwardly from the apparatus through the top opening, and a circuit in the enclosure operable to develop an electric signal which is converted to an audible sound signal emitted by the speaker. Modulation means are incorporated into the circuit to cyclically ...
In combination with a room having a ceiling and being adapted for use by adult persons of average height, sound generating apparatus for producing sound signals which mask other sounds present in said room, said apparatus comprising a hollow enclosure having a top opening and a side opening through which sound signals are emitted, a speaker mounted in said enclosure intermediate said top opening and said side opening, said speaker being positioned to face outwardly from said enclosure through said top opening, circuit means disposed in said hollow enclos...