编辑“︁TRS端子”︁（章节）

== 历史 ==
{{frac|1|4}}英寸（6.35mm）端子最早可以追溯到1877年于波士顿安装的第一台电话交换机<ref>{{cite web |url= http://www.newvision-sherwinpioneers.org/the-birthplace-of-the-telephone/ |url-status= live |title= Birthplace of the Telephone |website= New Vision Pioneers |language= en |archive-url= https://web.archive.org/web/20230716042802/http://www.newvision-sherwinpioneers.org/the-birthplace-of-the-telephone/ |archive-date= 2023-07-16 |access-date= 2024-04-04}}</ref>，以及随后于1878年{{link-en|George Willard Coy}}<ref>{{cite web |url= https://connecticuthistory.org/the-first-commercial-telephone-exchange-today-in-history/
|url-status= live |title= First Commercial Telephone Exchange – Today in History: January 28 |author= Laura Smith |year= 2020-01-28 |website= Connecticut History |language= en |archive-url= https://web.archive.org/web/20240305014401/https://connecticuthistory.org/the-first-commercial-telephone-exchange-today-in-history/ |archive-date= 2024-03-05 |access-date= 2024-04-04}}</ref><ref>{{cite web |url= https://www.scaruffi.com/politics/telephon.html |url-status= live |title= A Brief History of the Telephone |author= Piero Scaruffi |website= piero scaruffi |language= en |archive-url= https://web.archive.org/web/20230716042800/https://www.scaruffi.com/politics/telephon.html |archive-date= 2023-07-16 |access-date= 2024-04-04}}</ref>在[[纽黑文]]设立的第一台商用人工电话交换机<ref>{{cite web |url= https://www.theatlantic.com/technology/archive/2014/09/when-your-friendly-phone-operator-was-a-teenage-boy/380468/ |url-status= live |title= When Phone Operators Were Unruly Teenage Boys |author= Megan Garber |year= 2014-09-19 |website= [[大西洋 (雜誌)|The Atlantic]] |language= en |archive-url= https://web.archive.org/web/20240114225312/https://www.theatlantic.com/technology/archive/2014/09/when-your-friendly-phone-operator-was-a-teenage-boy/380468/ |archive-date= 2024-01-14 |access-date= 2024-04-04}}</ref><ref>{{cite web |url= http://etler.com/docs/WECo/Fundamentals/files/3-LocalManual.pdf |url-status= dead |title= Chapter 3 Local Manual Systems |website= etler |language= en |format= PDF |archive-url= https://web.archive.org/web/20230621101846/https://etler.com/docs/WECo/Fundamentals/files/3-LocalManual.pdf |archive-date= 2023-06-21 |archive-format= PDF |access-date= 2024-04-04}}</ref>。

[[File:Scribner Phone-Connector Patent 489570.png|thumb|1880年12月27日，Scribner申请的489570号专利中的配套连接装置]]
[[File:Clausen-telephone-switchboard-plug-patent.png|thumb|1901年，Henry P. Clausen的专利]]
Charles E. Scribner将弹簧插孔应用到交换机上，并在1878年申请了专利<ref>{{Cite patent |country= US |number= 293198 |title= Telephone-Switch |fdate= 1879-08-23 |gdate= 1884-02-05 |invent1= Scribner |inventor1-first= Charles E. |url= https://patentimages.storage.googleapis.com/a6/07/a9/c8bf785c7d1260/US293198.pdf}} {{Wayback|url=https://patentimages.storage.googleapis.com/a6/07/a9/c8bf785c7d1260/US293198.pdf |date=20240530090013 }}</ref>。在装置中，连接弹簧的导电[[杠杆]]正常情况下只与一个触点相连，但当插头插入孔中并与该杠杆接触时，杠杆便会转动，从而断开连接。因为它很像一把折叠刀，所以这种插孔被称作Jack-knife<ref>{{Cite book |url= https://books.google.com/books?id=EaVSbjsaBfMC&q=western+electric+standard+switchboard+1880&pg=PA54 |title= 100 Years of Telephone Switching |last= Chapuis |first= Robert J. |publisher= IOS Press |year= 2003 |isbn= 9784274906114 |location= Amsterdam, the Netherlands |page= 51 |access-date= 2024-04-05 |archive-date= 2023-07-16 |archive-url= https://web.archive.org/web/20230716042800/https://books.google.com/books?id=EaVSbjsaBfMC&q=western+electric+standard+switchboard+1880&pg=PA54 |dead-url= no}}</ref>。此后，人们便将插孔称为“Jack”。Scribner在1880年申请了一项新专利<ref>{{Cite patent |country= US |number= 489570 |title= SPRING-JACK SWITCH |fdate= 1880-12-27 |gdate= 1893-01-10 |invent1= Scribner |inventor1-first= Charles E. |url= https://patents.google.com/patent/US489570A/en}} {{Wayback|url=https://patents.google.com/patent/US489570A/en |date=20231215060554 }}</ref>，去除了插孔中的杠杆结构，整体外形与现如今使用的接近。随后，Scribner对交换机的设计进行了改进，并于1882年申请了新专利<ref>{{Cite patent |country= US |number= 262701 |title= CIRCUITS FOR MULTIPLE SWITCH-BOARDS OF TELEPHONE-EXCHANGES |fdate= 1882-02-01 |gdate= 1882-08-15 |invent1= Scribner |inventor1-first= Charles E. |url= https://patents.google.com/patent/US262701A/en}} {{Wayback|url=https://patents.google.com/patent/US262701A/en date=20231215062125 }}</ref><ref>{{Cite patent |country= US |number= 305021 |title= MULTIPLE SWITCH-BOARD FOR TELEPHONE-EXCHANGES |fdate= 1882-03-20 |gdate= 1884-09-09 |invent1= Scribner |inventor1-first= Charles E. |url= https://patents.google.com/patent/US305021A/en}} {{Wayback|url=https://patents.google.com/patent/US305021A/en |date=20231215062119 }}</ref>。

[[File:Oldphoneplugs.jpg|thumb|老式TRS端子，上方为插孔，下方为插头。最左边的是TRS端子，其余的均为TS端子|227x227px]]
[[File:2-conductor male TS connectors.jpg|thumb|几款{{frac|1|4}}英寸TS端子|220x220px]]

在1901年，Henry P. Clausen申请了一项专利<ref>{{Cite patent |country= US |number= 711556 |title= TELEPHONE SWITCHBOARD-PLUG |fdate= 1901-04-13 |gdate= 1902-10-21 |invent1= Clausen |inventor1-first= Henry P. |url= https://patents.google.com/patent/US711556/en}} {{Wayback|url=https://patents.google.com/patent/US711556/en |date=20221001180731 }}</ref>，对端子结构进行了改进。现如今在音频设备上，这种{{frac|1|4}}英寸的TS端子仍被广泛使用。

[[西部電氣|西部电气]]是[[贝尔系统]]的主要设备制造部门，对大部分工程设计都进行了改动，其中便含数种新型端子，此后包括[[美国军队|美国军方]]在内的多个行业都采用了新型端子。截至到1907年，西部电气公司设计了以下几种型号<ref>{{cite web |url= http://www.telephonecollectors.info/index.php/browse/document-repository/catalogs-manuals/western-electric/we-catalogs/11201-1907ca-weco-telephonic-apparatus-and-supplies-catalog-ocr-r-large-file/file |url-status= live |title= Western Electric Company Telephonic Apparatus and Supplies(1907) |year= 1907 |website= TCI Library |language= en |format= PDF |archive-url= https://web.archive.org/web/20230716042839/https://www.telephonecollectors.info/index.php/browse/document-repository/catalogs-manuals/western-electric/we-catalogs/11201-1907ca-weco-telephonic-apparatus-and-supplies-catalog-ocr-r-large-file/file |archive-date= 2023-07-16 |archive-format= PDF |pages= 72-73 |access-date= 2024-04-04}}</ref>：
{| class="wikitable"
|-
!型号
!线芯数
!配套插孔
!线材型号
!用途
|-
|47
|2
|3、91、99、102、103、108、124型
|156、236型
|电话交换机
|-
|85
|3
|77型
|30型
|头戴式电话
|-
|103
|2（两对）
|91、99型
|87、254型
|头戴式电话和胸挂式麦克风
|-
|109
|3
|92型
|155、244型
|电话交换机
|-
|110
|3
|49、117、118、140、141型
|152、249型
|电话交换机
|-
|112
|2（两对）
|91、99型
|87型
|头戴式电话和带静音键的胸 <br />挂式麦克风
|-
|116
|1
|3、103型
|265型
|电话交换机
|-
|126
|3
|132型
|309型
|城市轨道系统
|}
到1950年，有2种主流设计：
* WE-309（兼容{{frac|3|16}}英寸接口，例如246型接口库），用于608A等高密度接口面板
* WE-310（兼容{{frac|1|4}}英寸接口，例如242型接口）

由此衍生出了几种现代版本：
* B级BPO316（与EIA RS-453不兼容）
* EIA RS-453：直径0.206英寸（5.2mm），见于IEC 60603-11:1992<ref>{{cite web |url= https://webstore.iec.ch/preview/info_iec60603-11%7Bed1.0%7Db.img.pdf |title= IEC 60603-11:1992 Connectors for frequencies below 3 MHz for use with printed boards - Part 11: Detail specification for concentric connectors (dimensions for free connectors and fixed connectors) |author= 国际电工委员会（IEC） |author-link= 国际电工委员会 |year= 1992-03-15 |website= International Electrotechnical Commission |language= fr |format= PDF |access-date= 2024-02-21 |archive-date= 2024-02-21 |archive-url= https://web.archive.org/web/20240221154535/https://webstore.iec.ch/preview/info_iec60603-11%7Bed1.0%7Db.img.pdf |dead-url= no }}</ref>

=== 军用型号 ===
西电插头的美国军用型号最初是在MIL-P-642第一个修订版中规定的，其中包括：
* M642/1-1
* M642/1-2
* M642/2-1
* M642/2-2
* M642/4-1
* M642/4-2
* MIL-P-642/2，又称PJ-051（与西电公司的WE-310相似，因此和EIA RS-453不兼容）。
* MIL-P-642/5A，又称PL-68，直径为0.206英寸（5.2mm）。常被用在航空收音机和{{link-en|Drake公司|R. L. Drake Company}}公司所生产的[[业余无线电]]设备的麦克风插孔。MIL-DTL-642F规定：“本规范涵盖电话（包括[[电信交换|电话交换]]机）、电报和电传电路中使用的电话插头，以及耳机、听筒及麦克风所使用的插头。”

=== 3.5mm和2.5mm接口 ===
3.5mm接口被设计于20世纪50年代，用于[[晶体管收音机]]的听筒，时至今日仍在广泛使用<ref>{{cite news |url= https://www.cbc.ca/news/science/apple-iphone-headphone-jack-history-1.3755120 |url-status= live |title= Apple be damned: the humble headphone jack has survived for more than a century |author= Jonathan Ore |year= 2016-09-10 |website= CBC/Radio-Canada |language= en |archive-url= https://web.archive.org/web/20231101045438/https://www.cbc.ca/news/science/apple-iphone-headphone-jack-history-1.3755120 |archive-date= 2023-11-01 |access-date= 2024-04-04}}</ref>。[[索尼]]于1964年发布的EFM-117J收音机普及了这一尺寸约为原版一半的版本<ref>{{cite web |url= http://www.sony.net/Fun/design/history/1960.html |url-status= dead |title= History-1960s |website= [[索尼|Sony]] |language= en |archive-url= https://web.archive.org/web/20210225081736/http://www.sony.net/Fun/design/history/1960.html |archive-date= 2021-02-25 |access-date= 2024-04-04}}</ref><ref>所述型号中对3.5mm耳机接口的描述: {{cite web |url= https://www.worthpoint.com/worthopedia/vintage-sony-1960-efm-117j-radio-47603127 |url-status= live |title= Vintage Sony 1960'S EFM-117J Radio |website= WorthPoint |language= en |archive-url= https://web.archive.org/web/20221215180735/https://www.worthpoint.com/worthopedia/vintage-sony-1960-efm-117j-radio-47603127 |archive-date= 2022-12-15 |access-date= 2024-04-04}}</ref>。

2.5mm接口在小型便携式电子产品中被广泛使用：它们经常出现在3.5mm麦克风插孔旁边，用于早期便携式录音机上的遥控开关（这种收音机配备的麦克风具有开关，并使用带有3.5和2.5mm插孔的两脚插头）。此类插头还用于[[交流配接器|适配器]]的低压直流电输入。但在后一种用途中，它们很快便被[[同轴电缆|同轴]]{{link-en|直流插头|DC connector}}所取代。2.5mm插孔有时也被用作移动电话的耳机插孔（见于[[#移动设备|移动设备]]）。

在美国，3.5mm和2.5mm有时分别称为{{frac|1|8}}英寸和{{frac|3|32}}英寸——尽管这些尺寸只是近似值<ref>{{cite web 
|url= https://www.cuidevices.com/product/interconnect/connectors/audio-connectors/audio-plugs/sp-3530
|url-status= live
|title= SP-3530
|website= CUI Devices
|language= en
|archive-url= https://web.archive.org/web/20231005033005/https://www.cuidevices.com/product/interconnect/connectors/audio-connectors/audio-plugs/sp-3530
|archive-date= 2023-10-05
|access-date= 2024-04-04}}</ref>。所有尺寸都有2芯（非平衡单声道，见于[[#非平衡音频|非平衡音频]]）或3芯（{{link-en|平衡单声道|Balanced audio}}或非平衡[[立体声]]）版本。

3.5mm插头和插孔的4芯版本仅用于某些特定场景：通常用于袖珍[[摄像机]]和便携式媒体播放器，提供立体声和复合模拟视频。它还用于组合立体声音频、麦克风，并用于控制某些笔记本电脑和大多数[[移动电话]]上的媒体播放、通话、音量或[[虛擬助理|虚拟助手]]<ref>{{cite web 
|url= https://source.android.com/docs/core/interaction/accessories/headset/plug-headset-spec?hl=zh-cn
|url-status= live
|title= 3.5 毫米耳机：配件规范
|year= 2022-09-23
|website= Android 开源项目
|language= zh
|archive-url= https://web.archive.org/web/20240323154635/https://source.android.com/docs/core/interaction/accessories/headset/plug-headset-spec?hl=zh-cn
|archive-date= 2024-03-23
|access-date= 2024-04-04}}</ref>，以及[[八重洲无线]]的一些手持式[[业余无线电]]收发器<ref>{{cite web 
|url= http://ad7gd.net/vx6/datacable.html
|url-status= live
|title= Build a Data Cable for the Yaesu VX-6
|author= Ben Jackson
|year= 2006-11
|website= ad7gd.net
|language= en
|archive-url= https://web.archive.org/web/20240104105136/http://ad7gd.net/vx6/datacable.html
|archive-date= 2024-01-04
|access-date= 2024-04-04}}</ref>。一些[[耳机放大器]]用它来连接平衡立体声耳机，由于声道不能公用接地，因此每个声道需要两个线芯<ref>{{cite web 
|url= https://support.lhlabs.com/support/solutions/articles/5000650338-geek-out-v2-user-manual
|url-status= dead
|title= Geek Out V2+ User Manual
|year= 2015-11-25
|website= LH Labs
|language= en
|archive-url= https://web.archive.org/web/20200820035152/https://support.lhlabs.com/support/solutions/articles/5000650338-geek-out-v2-user-manual
|archive-date= 2020-08-20
|access-date= 2024-04-04}}</ref>。

=== 广播 ===

到了20世纪40年代，广播行业在演播室开始使用西电的103型插头和配套插孔。使用这个型号的原因是因为[[AT&T]]将其用于长线电路中，用以通过广播网络租用的电话线来播送[[廣播節目|广播节目]]。但由于这种型号会占用大量空间，广播行业又在40年代末开始改用含3根线芯的WE 291型插头和WE 239型插孔。之所以使用291型插头而不是标准的110型插头，是因为110型TRS插头上灯泡形状的设计会导致在插拔插头时两个音频信号连接短路。291型插头的长度较短，从而避免了短路的问题<ref>{{Cite journal
|last= Chinn
|first= Howard
|date= July 1947
|title= Single Jacks for Broadcast Application
|url= https://www.americanradiohistory.com/Archive-NAB-Engineering/NAB-4th-Edition/Section-5--NAB-Engineering-4th-Edition.pdf#page=136
|journal= Audio Engineering
|volume= 31
|issue= 6}}</ref>。

=== 音像与通信 ===

{{link-en|专业音频|Professional audio}}和[[电信|电信行业]]使用直径为0.173英寸（4.4mm）的插头，其商标名称包括Bantam、TT、Tini-Telephone和Tini-Tel等。此类插头与EIA RS-453/IEC 60603-11所定义的{{frac|1|4}}英寸插孔并不兼容。除了直径稍小之外，它们的形状也略有不同<ref name="soundonsound">{{cite web 
|url= https://www.soundonsound.com/sound-advice/low-down-analogue-interfacing 
|title= The Low-down On Analogue Interfacing 
|author= Hugh Robjohns 
|year= 2007-05 
|website= {{link-en|Sound on Sound}} 
|language= en 
|access-date= 2024-02-22 
|archive-date= 2024-02-23 
|archive-url= https://web.archive.org/web/20240223033010/https://www.soundonsound.com/sound-advice/low-down-analogue-interfacing 
|dead-url= no 
}}</ref>。该插头的三线芯版本能够处理[[平衡傳輸線|平衡线路]]信号，因此用于专业音响的安装。尽管Bantam接口无法处理与{{frac|1|4}}英寸（6.35mm）接口一样大的功率，{{link-en|工程可靠性|Reliability engineering}}也不如后者<ref>Gibson, Bill. (2007) [https://books.google.com/books?id=r86J_aNNReEC&pg=PA202 ''The Ultimate Live Sound Operator's Handbook'', p. 202.] Hal Leonard Corporation. {{ISBN|1-4234-1971-5}}</ref>，但它还是被用于[[錄音室|录音室]]和{{link-en|现场混音|Live sound mixing}}时的[[调音台]]和外置[[配线架]]，因为在有限的空间内需要大量的接口<ref name="soundonsound" />。Bantam插头的形状有所不同，在使用时不易造成短路。

=== 航空和军用接口 ===
{{Further|{{link-en|航空耳麦接口列表|List of aviation headset connectors}}}}
[[File:PJ-055 and PJ-068 Connectors.png|thumb|PJ-055（上）和PJ-068（下）型通用航空音频插头]]
[[File:Aircraft plug.gif|thumb|U-174/U或Nexus TP120型插头，常用于军用飞机和民用直升机]]

美国军方使用包括{{frac|9|32}}英寸（7.14mm）和{{frac|1|4}}英寸（6.35mm）接口<ref>MIL-J-641</ref>在内的多种TRS端子。

商用和[[通用航空]]（GA）飞机通常使用一对TRS端子。耳机使用标准的{{frac|1|4}}英寸的2芯或3芯插头，型号为PJ-055。麦克风则使用较小的{{frac|3|16}}英寸（5.23mm）的3芯插头，型号为PJ-068。

在军用飞机和民用直升机上，使用U-174/U（TP-101）<ref>{{cite web 
|title= Item # TP-101, Telephone Plug 
|url= https://connectors.nexus.com/item/telephone-plugs-and-jacks/telephone-plugs/tp-101 
|website= Amphenol NEXUS Technologies 
|access-date= 2024-03-03 
|language= en-us 
|archive-date= 2023-03-07 
|archive-url= https://web.archive.org/web/20230307045022/https://connectors.nexus.com/item/telephone-plugs-and-jacks/telephone-plugs/tp-101 
|dead-url= no 
}}</ref>，也称U-93A/U（Nexus TP-102）<ref>{{cite web 
|title= Item # TP-102, Telephone Plug 
|url= https://connectors.nexus.com/item/telephone-plugs-and-jacks/telephone-plugs/tp-102 
|website= Amphenol NEXUS Technologies 
|access-date= 2024-03-10 
|language= en-us 
|archive-date= 2023-03-07 
|archive-url= https://web.archive.org/web/20230307045836/https://connectors.nexus.com/item/telephone-plugs-and-jacks/telephone-plugs/tp-102 
|dead-url= no 
}}</ref>和Nexus TP-120<ref>{{cite web 
|title= Item # TP-120, Telephone Plug 
|url= https://connectors.nexus.com/item/telephone-plugs-and-jacks/telephone-plugs/tp-120 
|website= Amphenol NEXUS Technologies 
|access-date= 2024-03-10 
|language= en-us 
|archive-date= 2023-03-07 
|archive-url= https://web.archive.org/web/20230307124327/https://connectors.nexus.com/item/telephone-plugs-and-jacks/telephone-plugs/tp-120 
|dead-url= no 
}}</ref>，又称美国北约插头（US NATO plugs）。此种插头直径为0.281英寸（7.1mm），内含4条线芯，耳机2条，麦克风2条。此外，还有直径相同但长度稍长的U-384/U（Nexus TP-105），线芯从4条变为5条<ref>{{cite web 
|title= Item # TP-105, Telephone Plug 
|url= https://connectors.nexus.com/item/telephone-plugs-and-jacks/telephone-plugs/tp-105 
|website= Amphenol NEXUS Technologies 
|access-date= 2024-03-10 
|language= en-us 
|archive-date= 2023-03-07 
|archive-url= https://web.archive.org/web/20230307045337/https://connectors.nexus.com/item/telephone-plugs-and-jacks/telephone-plugs/tp-105 
|dead-url= no 
}}</ref><ref>{{cite web 
|url= https://assets.bose.com/content/dam/Bose_DAM/Web/consumer_electronics/global/products/headphones/a20_aviation_headset/pdf/746706_og_a20_en.pdf
|url-status= live
|title= Bose A20 Aviation Headset Owner's Guide
|date= 2022
|website= Bose
|language= en
|format= PDF
|archive-url= https://web.archive.org/web/20231207151849/https://assets.bose.com/content/dam/Bose_DAM/Web/consumer_electronics/global/products/headphones/a20_aviation_headset/pdf/746706_og_a20_en.pdf
|archive-date= 2023-12-07
|archive-format= PDF
|access-date= 2024-04-04}}</ref>。

另有一种四芯的671型（10H/18575）插头，直径为0.298英寸（7.57mm）<ref>{{cite web 
|url= https://www.casa.co.nz/connectors/multipole/audio/Avionics-671Series-Data_1p.pdf
|url-status= live
|title= Type 671 datasheet
|website= CASA
|language= en
|format= PDF
|archive-url= https://web.archive.org/web/20230408152038/https://www.casa.co.nz/connectors/multipole/audio/Avionics-671Series-Data_1p.pdf
|archive-date= 2023-04-08
|archive-format= PDF
|access-date= 2024-04-04}}</ref>，用在许多英国军用飞机上的耳麦上，因此又被称为英国北约插头（UK NATO connector）或欧洲北约插头（European NATO connector）<ref name="Scott Bouch">{{cite web 
|title= British Aircrew 671-Type Plug / NATO Plug 
|url= https://www.scottbouch.com/aircrew-uk-connector-plug-671-type-nato.htm 
|website= www.scottbouch.com 
|access-date= 2024-03-10 
|archive-date= 2023-03-05 
|archive-url= https://web.archive.org/web/20230305135506/https://www.scottbouch.com/aircrew-uk-connector-plug-671-type-nato.htm 
|dead-url= no 
}}</ref>。

=== 专用型号 ===

[[File:Aadoublejackplug.jpg|thumb|含两条线芯的310型双针TRS端子]]

双针端子在电信行业被称为“310型”，由两个{{frac|1|4}}英寸端子组成，[[中心距|中心间距]]为{{frac|5|8}}英寸（16mm）。双针端子的插孔可以与普通端子一起使用，当然前提是端子的体积不能太大。但双针端子只能插入中心间距为{{frac|5|8}}英寸的两个体积较小的插孔或接线板。如今，电信公司仍在{{link-en|DS1|Digital Signal 1}}电路的{{link-en|DSX配线架|Digital cross-connect system}}<ref>{{cite web 
|url= https://telect.my.salesforce-sites.com/support/servlet/fileField?id=0BEU0000000PBRS 
|title= DSX-1 Technical Reference Guide 
|author= Telect 
|year= 2010 
|website= Salesforce 
|language= en 
|format= PDF 
|access-date= 2024-02-23 
|archive-date= 2024-02-22 
|archive-url= https://web.archive.org/web/20240222164733/https://telect.my.salesforce-sites.com/support/servlet/fileField?id=0BEU0000000PBRS 
|dead-url= no 
}}</ref>上使用这种端子。在老式飞机的扶手上，还有一种3.5mm双针端子，用在飞机的娱乐系统上。仅将双针端子的一个端子插入插孔时，就需要使用适配器，否则会导致音频设备的一侧发声单元无信号输入，从而无法发声。

短式插头用于20世纪的[[高阻态|高阻抗]]单声道耳机，特别是在[[第二次世界大戰飛機列表|二战中的飞机]]上使用的头戴式耳机。虽然常规型号的耳机可以在此类插孔中正常使用，但由于短式插头并不能卡在正常插孔上，且其几乎没有现代使用场景，如今几乎很难见到这种插头。

一些厂商还制造了不同长度粗细的非标准插头，在受限的场景下使用，例如用于消防安全通信的内径为0.210英寸（5.3mm）的插孔。此插孔也在已停产的{{link-en|贝灵巧|Bell & Howell}}16mm投影仪扬声器中被使用<ref>{{Cite web
|title= Telephone Jack and Telephone Plug Mating Chart
|url= http://smartdata.usbid.com/datasheets/dsid/145849.pdf
|website= Switchcraft
|language= en
|year= 2005-02-13
|url-status= dead
|archive-url= https://web.archive.org/web/20140413124010/http://smartdata.usbid.com/datasheets/dsid/145849.pdf
|archive-date= 2014-04-13
|archive-format= PDF}}</ref>。

=== 逐渐淘汰 ===

虽然在台式电脑、乐器扩音器<ref name="RockStock">{{cite web |url= https://rockstockpedals.com/blogs/blog/wired-for-sound-a-musicians-guide-to-ts-and-trs-cables |url-status= live |title= Wired for Sound: A Musician's Guide to TS and TRS Cables |year= 2024-04-02 |website= RockStock |publisher=RockStock Pedal Co. |language= en |archive-url= https://web.archive.org/web/20250419044155/https://rockstockpedals.com/blogs/blog/wired-for-sound-a-musicians-guide-to-ts-and-trs-cables |archive-date= 2025-04-19 |access-date= 2025-06-16}}</ref>、直播和录音设备中<ref name="Sound Unlocked">{{cite web |url= https://soundunlocked.com/what-is-a-trs-cable |url-status= live |title= What Is A TRS Cable? TRS vs TS Cables |last1=Collins |first1=Keith |website= Sound Unlocked |language= en |archive-url= https://web.archive.org/web/20241211090256/https://soundunlocked.com/what-is-a-trs-cable |archive-date= 2024-12-11 |access-date= 2025-06-16}}</ref><ref name="GEARit">{{cite web |url= https://www.gearit.com/blogs/news/ts-vs-trs-cables |url-status= live |title= TS vs TRS Cables: What’s the Difference? |website= GEARit |publisher= GoDirectInc.com Inc |language= en |archive-url= https://web.archive.org/web/20250324071525/https://www.gearit.com/blogs/news/ts-vs-trs-cables |archive-date= 2025-03-24 |access-date= 2025-06-16}}</ref>，TRS仍是一种标准输出接口，但许多智能手机已不再使用TRS端子<ref>{{cite web |url= https://appleinsider.com/articles/22/08/17/seven-years-later-apple-was-right-to-kill-off-the-35mm-headphone-jack |url-status= live |title= Seven years later, Apple was right to kill off the 3.5mm headphone jack |author= Mike Peterson |year= 2022-08-17 |website= Appleinsider |language= en |archive-url= https://web.archive.org/web/20250604144909/https://appleinsider.com/articles/22/08/17/seven-years-later-apple-was-right-to-kill-off-the-35mm-headphone-jack |archive-date= 2025-06-04 |access-date= 2025-06-16}}</ref>。

[[數位音訊]]现在很常见，可通过{{link-en|USB声卡|Sound card#USB sound cards}}、USB耳机、[[藍牙]]、{{link-en|集成音频的视频接口| Audio and video interfaces and connectors#Multiple signals}}（如[[DisplayPort]]和[[HDMI]]）传输。数字设备还可能有内置扬声器和麦克风。TRS则由于尺寸原因在一些轻薄的设备上被认为是浪费空间。虽然采用低[[表面安装技术|SMT技术]]后接口的防水深度可达1米<ref>{{cite web |url= https://www.sameskydevices.com/waterproof-audio-jacks |url-status= live |title= Waterproof Audio Jacks – IP67 Rated Stereo Connectors |website= CUI Devices |language= en |archive-url= https://web.archive.org/web/20250605105146/https://www.sameskydevices.com/waterproof-audio-jacks |archive-date= 2025-06-05 |access-date= 2025-06-16}}</ref>，但将接口完全移除更有助于[[防水]]<ref name="Teodoro">{{cite web |url= https://www.techtimes.com/articles/296476/20230917/reasons-why-smartphone-industry-trying-to-kill-3-5-mm-headphone-jack.htm |url-status= live |title= 5 Reasons Why the Smartphone Industry Is Trying to Kill the 3.5 Mm Headphone Jack |last1= Teodoro |first1= Jeffrey |year= 2023-09-17 |website=Tech Times |publisher=Tech Times LLC |language= en |archive-url= https://web.archive.org/web/20241210234107/https://www.techtimes.com/articles/296476/20230917/reasons-why-smartphone-industry-trying-to-kill-3-5-mm-headphone-jack.htm |archive-date= 2024-12-10 |access-date= 2025-06-16}}</ref>。

中国手机制造商很早就开始不使用TRS端子：最早是2012年7月[[OPPO]]的[[OPPO#Find系列|Finder]]（包装内附带[[USB#Micro USB接口|micro-USB]]耳机并支持蓝牙耳机），随后是2014年[[vivo]]的X5Max、2016年4月的[[樂視控股|乐视]]、2016年9月[[联想集团|联想]]的{{link-en|Moto Z}}<ref>{{Cite web |date=2016-09-08 |title=Apple is late, not early, to ditching the headphone jack |url=https://qz.com/776383/iphone-7-three-chinese-smartphone-makers-ditched-the-headphone-jack-before-apple |url-status=live |archive-url=https://web.archive.org/web/20240101004820/https://qz.com/776383/iphone-7-three-chinese-smartphone-makers-ditched-the-headphone-jack-before-apple |archive-date=2024-01-01 |access-date=2024-07-12 |website=Quartz |language=en}}</ref>。[[蘋果公司|苹果]]于2016年9月发布的[[iPhone 7]]最初因取消TRS接口而受到[[三星電子|三星]]和谷歌等其他制造商的批评，而后这些厂商也纷纷效仿<ref>{{Cite web |date=2022-08-17 |title=Seven years later, Apple was right to kill off the 3.5mm headphone jack |url=https://appleinsider.com/articles/22/08/17/seven-years-later-apple-was-right-to-kill-off-the-35mm-headphone-jack |url-status=live |archive-url=https://web.archive.org/web/20231123203338/http://appleinsider.com/articles/22/08/17/seven-years-later-apple-was-right-to-kill-off-the-35mm-headphone-jack |archive-date=2023-11-23 |access-date=2023-12-15 |website= {{link-en|Apple Insider|Apple community}} |language=en}}</ref>。一些平板电脑和轻薄笔记本电脑（如2020年的[[联想集团|联想]]生产[[Chromebook]]和[[華碩]]的[[ZenBook]] 13<ref>{{Cite web |title=Asus ZenBook 13 (2020) review: This small laptop makes a big impression |url=https://www.cnet.com/tech/computing/asus-zenbook-13-2020-review-this-small-laptop-makes-a-big-impression/ |access-date=2024-07-13 |website=CNET |language=en}}</ref>）也没有TRS接口。