TRRS

There’s A New Headset Connector In Town

Sony TRRRS Connector MDR-NC31EMSome time ago I published a backgrounder on 3.5mm headset connectors. It detailed a bit of history of the 1/8″ (3.5mm) mini-plug, from the Sony Walkman of old to present day. That evolution could also be described as from “Tip-Ring-Sleeve”  (TRS) to Tip-Ring-Ring-Sleeve”  (TRRS.)  That post has proven surprisingly popular.

It’s been said that the universe is continually expanding. That includes the universe of mini-plug variants. Today I got my first look at the next step in the evolution of the lowly mini-plug; TRRRS!

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Some Guidance On Headsets

Passport_21_OTH_3_QTR_RightA couple of weeks ago, over at the Broadband Reports forum on VoIP Tech, there was a question posed about selecting the best low cost microphone for VoIP applications. This is a topic that I’ve considered at length. It has much in common with my background in recording and broadcasting. On that basis I weighed in with some opinion. As I my way, I probably provided a longer answer than anyone anticipated, or even wanted. After re-reading it a few times I thought it worth sharing here as well.

The original question:

I realize many problems people experience are due to a lousy mic that isn’t noise canceling or picks up sounds from a anywhere in the room. There are many ways to improve this. I like the idea of a pickup pattern that is very isolated in front of the mic and within a finite range so I don’t have to wear the mic but maybe this is asking too much. If the mic only picks up sounds very close to it, wearing it can sure avoid a lot of problems. Don’t know if firewire or USB3 is better than USB2 or if its better to run the mic directly into your mic input of your motherboard or audio card or something else. Latency is not our friend! VOIP is so sensitive to extraneous noise so this needs to be addressed and is dependent on the ambient noise of the user. Any recommendations? Few of us work in a soundproof office.

As a long-time and vocal proponent of headsets for office use this is right in my wheelhouse. For example…. https://www.mgraves.org/2011/07/can-you-hear-me-now-headset-vs-speakerphone-in-the-home-office/

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Wired Headsets: A Tutorial on Connectors, Cables & Pinouts

Headset DevicesPrior to smart phones life was much simpler…at least with respect to the wiring for headsets used with portable music players vs cell phones. A recent project has me dealing with some wired headsets. I thought it worth sharing some of the things that I’ve noted along the way, along with just a bit of the history.

What I’m describing relates to the various ways in which the common headset connector has been used over time and across a number of application contexts, including:

  • Music players
  • Desk phones
  • Smart phones
  • Computers

In the beginning there was the pocket transistor radio. When Sony got around to it some transistor radios featured a 3.5mm (1/8”) 2-conductor jack. This was intended to receive an earphone for private listening. It was also called a “mini-jack” since stereo headphones for listening to music used the full-sized, 1/4”  phone plug.

It’s unclear if the creation of the earphone feature was motivated by the desire to listen to the radio after bedtime, or avoid aggravating the Mrs with the play-by-play of the baseball game.

…time passes, until…

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