I was poking about on the internet and read this on Wikipedia about glottalic conconants. I thought it produced the same sort of feeling in the throat that is achieved through pipe breathing and thought I would post it as it may be helpful to others who are struggling to get the right constriction:
http://en.wikipedia.org/wiki/Glottalic_consonant
How to produce an ejective consonant[edit]
In order to produce, for example, an ejective k, do as follows:
Press the back of your tongue to the roof of your mouth so as to pronounce a [k].
Move your glottis upward. If this is not something you normally do, you may need to monitor your adam's apple with your fingers.
You may notice the pressure building. Release the back of your tongue, letting out air for a [ka]. The [k] should be clicky and dull. (Your glottis will move down again during the [a], so don't mind that.)
The same principle applies to the other ejective consonants, but [kʼ] is the easiest.
http://en.wikipedia.org/wiki/Glottalic_consonant
How to produce an ejective consonant[edit]
In order to produce, for example, an ejective k, do as follows:
Press the back of your tongue to the roof of your mouth so as to pronounce a [k].
Move your glottis upward. If this is not something you normally do, you may need to monitor your adam's apple with your fingers.
You may notice the pressure building. Release the back of your tongue, letting out air for a [ka]. The [k] should be clicky and dull. (Your glottis will move down again during the [a], so don't mind that.)
The same principle applies to the other ejective consonants, but [kʼ] is the easiest.