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機器雑談 - ヘッドホン 2

Telephonics製の聴力検査用のヘッドホンの画像が意外にないのでここで紹介する。

IEC基準カプラ・人工耳に関する詳細なレビューは別ページへ。

TDH-49P

モリタのオージオメータ付属品。RION以外の聴力検査用のヘッドホンはほとんどTelephonics製でそれ以外は見たことがない。 耳載せ形イヤホンとして規格にはBeyer DT48も載っているが、日本ではオージオメータに付いているのを見たことがないので採用例はたぶんないのだろう。 日本では同じような型番が売られているが、同等品かは不明。 TDH-39P(またはTDH-39、Pつき型番は外形がプラスチック製)は基準カプラ(IEC 60318-3)で校正する旧型で、 それ以降の型番はすべて人工耳(IEC 60318-1)で校正することになっているので、 よほどの理由がない限り、TDH-39Pは今後はアメリカ以外ではあまり使われないと思う。リオンのAD-02系、AD-06系のヘッドホンは、 設計時に基準カプラ(IEC 60318-3)フラットで作られているが、新JIS以降がIECに適合してすべて人工耳(IEC 60318-1)での校正になっている。 附属マニュアルにIEC 60318-1でのRETSPLが載っているが、人工耳フラットな設計で作られたという訳ではない。ただ、基準カプラでフラットな設計だと 人工耳でもだいたいフラットになる傾向がある。輸入品なのでELEGA製やRION製のよりちょっと高価で、代理店通して10万円弱だったと思う。 そう考えると、いいヘッドホンが日本ではかなり安く買えるともいえる。

ヘッドバンド付き Telephonics TDH-49P

ヘッドバンドから外したところ

イヤパッドを外したところ

音の出る側
この穴の構成は、DR-531(やDR-631)とほぼ同じで、ELEGAの方がコピーしたと思われる

新旧のクッション

TDHシリーズ(TDH-39、TDH-49)のクッションには新旧あって、現行の新モデルはModel 51 (P/N 510C017-1)であるが、 旧モデルはMX 41/ARという少し大きめのクッションだった。RIONの聴力検査用のヘッドホンに適合させるクッションは、 MX 41/ARをコピーしたもので、現行のTelephonicsのヘッドホンにもほぼはまるが、検査用には適合しない。

Model 51 (P/N 510C017-2)

旧型のMX 41/ARと比べてつばの部分のゴムが薄くなっており、耳に圧着した時の痛みが軽減されていると思われる。 ELEGA製のヘッドホンのうち、いずれかの基準カプラ(IEC 60318-3)・人工耳(IEC 60318-1)に適合する品種の現行クッションはこちら。 純正品は代理店通して1個900円程度。

MX-41/AR

一部は他のサイトから収集したものである。現在は殆ど使われていないので入手できるか不明。

RIONの聴力検査用ヘッドホンのMX 41/ARとほぼ同じ現行のクッション

MX 41/ARタイプがどうしても必要で、同等品でよければこのRIONのが使えるかもしれない。価格は上記とだいたい同じ。

RadioEar B-71

骨導聴力検査用の骨導端子はまた別項目で取り上げようと思うが、参考として載せておく。骨導端子もRIONでは作っていて、 戦後の欧米模倣から始まる技術革新を地でいっているのが感じられる。

There is no IGLU Cabal! Its members spent a better time of their lives writing
an RDBM server in a purely functional programming language. After having to
deal with designing many FP-friendly algorithms, and dealing with ugly code
that was made uglier due to FP, they found the task of maintaining the IGLU
site too mundande and unchallenging.

Shlomi Fish in Hackers-IL message No. 1964

    -- Shlomi Fish
    -- Hackers-IL Message No. 1964 ( http://tech.groups.yahoo.com/group/hackers-il/message/1964 )

          <rindolf>  dazjorz: I considered switching my default nick to
                     "shlomif", because that's how most people know me.
          <dazjorz>  rindolf: yeah, it's your alternative nick now right?
          <rindolf>  dazjorz: but then XChat2 reverted to the old nick and
                     I was too lazy.
           <unreal>  You seem to have many, well, stupid friends, rindolf
                     :P
          <rindolf>  dazjorz: yes, I have it registered.
          <rindolf>  unreal: stupid?
              <Zuu>  rindolf, noo! what to do about the tomato then? fish
                     dont have big tomato noses!
          <rindolf>  Zuu: fish?
          <rindolf>  Zuu: I'll give you a tomoato.
              <Zuu>  good question
          <rindolf>  I'll give you the tomato back.
              <Zuu>  where do i get fish from
              <Zuu>  no no, keep it :D
          <rindolf>  Zuu: my last name is Fish.
                  *  tommy_the-dragon slaps zuu with a fish
 <tommy_the-dragon>  there ya go
          <dazjorz>  rindolf: I just registered 'sjors'
                  *  rindolf gives a fish to Zuu
          <dazjorz>  rindolf: as a nick.
              <Zuu>  rindolf, thats just absurd, a reindeer with 'fish' as
                     surname...
              <Zuu>  your parents must have hated you
          <rindolf>  Open source: "everyone contributes a fish, and in
                     exchange everyone gets their own ocean."
          <rindolf>  dazjorz: ah, cool.
              <Zuu>  tommy_the-dragon, does dragons eat other animals,
                     like fish?
           <unreal>  Ocean == Big Momma's Bath?
          <rindolf>  Zuu: I'm not a reindeer - I just play one on T.V.
 <tommy_the-dragon>  not fish...
 <tommy_the-dragon>  just reindeers
              <Zuu>  tommy_the-dragon, what about fake TV reindeers ?
              <Zuu>  Nice :D
          <rindolf>  unreal: no, the whole enchilada.
          <rindolf>  tommy_the-dragon: LOL.
 <tommy_the-dragon>  and enchiladas
          <dazjorz>  rindolf: I know someone whose nick is Stonehead, he
                     made his three-letter acronym stn, but usually it's
                     letters from the first name
          <dazjorz>  uh
          <dazjorz>  the full name
          <dazjorz>  yours could be shf for example, and everybody would
                     know "hey, that's shlomi"
          <dazjorz>  but I'm at most sg, so I need to borrow another
                     letter somewhere, or make it daz or just sjors
                  *  dazjorz thinks
 <tommy_the-dragon>  my cat eats flies...
          <rindolf>  dazjorz: I hate these three letter acronyms.
              <Zuu>  shlomi really sounds like some dish made of reindeer
 <tommy_the-dragon>  but hes lucky because i dont eat cats
          <rindolf>  Zuu: heh.
           <unreal>  heh
          <rindolf>  tommy_the-dragon: I didn't know dragons had cats.
          <dazjorz>  what's the name of the red-nosed reindeer again?
              <Zuu>  it sounds edible at least
          <dazjorz>  oh rudolf :)
          <rindolf>  dazjorz: Randolph.
          <dazjorz>  oh
           <unreal>  I used to have a friend whos nick was "crap"
          <rindolf>  unreal: wow.
          <dazjorz>  <someguy> crap, someone stole my bicycle
          <dazjorz>  <crap> ok?
          <rindolf>  dazjorz: heh.
          <dazjorz>  rindolf: why don't you like the three-letter
                     acronyms?
          <rindolf>  dazjorz: often too confusing.
          <rindolf>  dazjorz: and two easy to mistype.
          <rindolf>  dazjorz: and not too memorable.
           <unreal>  LIS.
          <dazjorz>  three easy to mistype, I think
          <rindolf>  And often hard to pronounce.
          <dazjorz>  maybe I'll just go with sjors
          <rindolf>  too easy. Freudian.
          <rindolf>  dazjorz: yes, I think that's a good idea.
           <unreal>  (Lies, I say!)
          <dazjorz>  hehe, rindolf++ # freudian
              <Zuu>  or you could pick something girly and hope people
                     will treat you nicer :)
          <rindolf>  dazjorz: have you played with the farnsworth bot yet?
          <rindolf>  Zuu: RinGirl
          <rindolf>  Though nicks with "Girl " in them tend to draw too
                     much attention.
              <Zuu>  nah, it cant contain 'girl' that just seems fake
          <dazjorz>  rindolf: I have
          <dazjorz>  rindolf: remind me to fix knotify, khtml, and quassel
                     :(
          <rindolf>  dazjorz: nice.
          <rindolf>  dazjorz: using MemoServ?
          <dazjorz>  rindolf: the bugs annoy me, a lot, but I never get
                     around to actually trying to fix them
          <rindolf>  Zuu: maybe I should call myself "shlomi". Americans
                     will think I'm a girl.
              <Zuu>  yeah, it kinda have a girlish sound to it
          <dazjorz>  rindolf: call yourself shloma, dutch people will
                     think you're over sixty and female
          <rindolf>  dazjorz: heh.
          <dazjorz>  let me rephase that
          <dazjorz>  dutch people will think you're female... and over
                     sixty
          <dazjorz>  (oma = grandma)
          <rindolf>  dazjorz: ah.
           <unreal>  kloot.
          <rindolf>  In Hebrew nouns that end with "ah" tend to be
                     feminine.
          <dazjorz>  shlomah?
          <rindolf>  Seriously now, if I change my nick it will be to
                     shlomif.
          <dazjorz>  let's change our nicks at the same time
          <rindolf>  Well, in Shlomi's case it would be Shlomith.
          <dazjorz>  I will be sjors, you will be shlomif
          <rindolf>  dazjorz: OK.
                  *  rindolf is now known as shlomif
          <dazjorz>  shit, now I have to
              <Zuu>  what does shlimif even mean ?
                  *  dazjorz is now known as sjors
            <sjors>  Zuu: shlomi = his first name, f = the first letter of
                     his last name
          <shlomif>  sjors: hi.
          <shlomif>  Zuu: shlomi fish.
            <sjors>  hi shlomif
          <shlomif>  Hi sjors
 <tommy_the-dragon>  where does rindolf come into it?
          <shlomif>  sjors: my nick is longer than yours.
              <Zuu>  oh lol, and i just said his name sound girly :P
                  *  Zuu pat pats shlomif ^^
          <shlomif>  tommy_the-dragon: Rindolf was a dwarven warrior I
                     played in AD&D.
 <tommy_the-dragon>  ahh ok
                  *  shlomif gives Zuu his tomato back.
              <Zuu>  :<
          <shlomif>  Since I'm no longer a reindeer.
            <sjors>  shlomif: that's just to compensate against something
                     you have that's way shorter than mine
          <shlomif>  sjors: LOL.
          <shlomif>  sjors++
              <Zuu>  Erhmm.. shlomif! how come there's this big hole in
                     it?
 <tommy_the-dragon>  sorry...
 <tommy_the-dragon>  my bad
              <Zuu>  Hehe
                  *  shlomif doesn't like raw tomatoes.
          <shlomif>  But I eat them with pasta, etc.
          <shlomif>  Or as meat sauce.
              <Zuu>  or in sandwiches
          <shlomif>  sjors: anyway, welcome to ##programming
              <Zuu>  or on reindeer nose
          <shlomif>  sjors: I'll probably revert to "rindolf" after next
                     disconnect.
          <shlomif>  Zuu: after you cook the entire reindeer.
                  *  shlomif is a reindeer cannibal.
          <shlomif>  Well, rindolf is.
              <Zuu>  yes, but he ran away
          <shlomif>  I also like dried and olive oiled tomatoes.
            <sjors>  shlomif: I just changed my clients' settings to
                     reconnect as sjors, too
          <shlomif>  Well, I think I'll go to sleep.
          <shlomif>  sjors: ah.
            <sjors>  shlomif: it'll probably take a while to "adapt" to
                     sjors instead of dazjorz
          <shlomif>  sjors: well, enjoy your new nick.
            <sjors>  and I still have dazjorz.com, and not sjors.anything
                  *  Zuu tugs shlomif in
            <sjors>  thanks ;)
          <shlomif>  Zuu: thanks.
                  *  Zuu quicly squeeses a fresh tomato onto shlomif's
                     nose
            <sjors>  shlomif: sjors.biz and sjors.mobi at most
                  *  shlomif doesn't have rindolf.{com,org,net} etc.
          <shlomif>  sjors: maybe sjors.in
          <shlomif>  I got a shlom.in
            <sjors>  sjors.indahou.se
          <shlomif>  sjors: heh.
            <sjors>  sjors.ac, sjors.ag, sjors.am, sjors.at
            <sjors>  hehe sjors.me
            <sjors>  sjors.pl, too bad i don't really do perl anymore
          <shlomif>  sjors: there's also .sh
            <sjors>  sjors.sh, too bad I don't really do shell script a
                     lot
          <shlomif>  Or .im
            <sjors>  sjors.tv, too bad I don't really watch..
 <tommy_the-dragon>  do you own a mobile?
          <shlomif>  .tv are pretty costly.
            <sjors>  meh I don't like sjors. anyway, so I'll just keep
                     dazjorz for everything
 <tommy_the-dragon>  yeah whats with that (the price of .tv)?
          <shlomif>  tommy_the-dragon: it's the foundation of the economy
                     of Tuvaly.

    -- Reindeers, Tomatoes and Normalising Nicks
    -- ##programming, Freenode


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