不器用なのにモノ作り大好きな中島です･･･その３
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スマホを携帯音楽プレーヤーとして
ご利用の方は多いと思うのですが･･･
イヤホンで聞いていると･･･
コードが引っかかったりして邪魔だし
内蔵スピーカーは音がイマイチだし･･･
そこで考えました！
あの小さな内臓スピーカーの低音を
増幅すれば鑑賞に耐えうる音に
なるのではないか？ と
今回、材料にするのは厚さ２㎜ほどの
ボール紙 そして準備する道具は↓
大雑把な図面を作ったら
（ダクトを左右に配した～なんちゃってステレオ風！）
想像力を働かせボール紙に線引きしカット
じつは厚さ２㎜ともなると厚みを考慮に
入れる必要がありますし
紙とは言えどカッターナイフで
カットするのはそれなりに大変です･･･
（てーか厚さは１㎜程度のボール紙で
十分だったかもなぁ･･･）
接合面は面取りの必要もあり
木片に紙ヤスリを巻きつけて削りました
木工ボンドで接着する時に重宝するのが
輪ゴム！
作業開始から６時間で や～っと
それでは～さっそく試聴♪
あれ？豊かな低音は何処に？
確かに音量は1.5倍ぐらいにはなったが･･･
じつは･･･
低音を増幅するのにホーン形状
（ラッパのような形状）
を取り入れたので指向性の高い高音が
犠牲になることは予測しておりましたが
思ったほど低音が出こない･･･
ここで「ハタ」と気がつきました･･･
音源であるスマホの内蔵スピーカーからは
増幅するべき低音が本来出ていない
という事に･･･
結果的に増幅されたのは中音のみ･･･
果たして著しく音楽ジャンルを選ぶものに
なってしまいました･･･
つまり･･･
イージーリスニングには向いているけど
ロックには向いていない
高音が耳障りな音源にはマッチするが
中音が中心の音源にはイマイチ
（中音しか聞こえないから安っぽい音に･･･）
しかしメゲずに塗装までやりましたよ～
これならスマホ・スタンドとしても
使えるでしょ？
（これって悪あがきでしょ！）
「ＤＨＤ」とは
ダイレクト・ホーン・ドライブの略
「００１」は その１号機の意
えっ？
欠点を克服した２号機は
いつ出来るのかって？
んん････････････････････････････････････
････････････････････････････････････････
2015年2月19日 9:36 AM | Category：花巻店