The throat device comprises a substantially straight body member having one end to be coupled with the horn, and at least two curved branch members coupled with the other end of said body member such that {HEAD ~ no phase interference} occurs in {TAIL ~ a high frequency sound range} 
The throat device comprises a substantially straight body member having one end to be coupled with the horn , and at least two curved branch members coupled with the other end of said body member such that { HEAD ~ no phase interference } occurs in { TAIL ~ a high frequency sound range }
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