Am I rude?

At work the phone rings and goes DERDOODERDOODERDOO painfully shrilly and loudly (I actually measured it with an app on my iPhone which measured only 72dB) and it's often for me; Drs surgeries wanting to arrange foreign-language interpreters.

LoudNigel goes BLAHBLAHMATEYEAHKNOWWHAT. He says he needs to speak loudly to people as it's a bad line/he's calling people on mobiles etc.

Then the receptionist from the surgery says '...hello...melissa...interpreter...tuesday...please...' faintly- pressing the volume control buttons on the phone won't increase the clarity, and they make a loud beep which drowns out conversation. I'm mostly ok with people I know on my mobile phone, so it might just be the landlines.

Then I say Nigel do you mind, I'm on the phone! and he says....yeah..I know...but I'm in the middle of something. I give him a Look. Then he says YEAHYOUKNOWI'MLOUDIT'SHOWIAM.

Then I say excuse me just a minute, and go into the corner. Faint Receptionist repeats herself and I say 'It's so and so from the surgery? You want a Polish interpreter for next Friday at 2pm? Ok, I'll call you back when I know. Thankyou, bye!'

Am I rude? I have snapped at him several times for his loudness which hurts my ears and when I'm on the phone it's bad. Work sent the surgeries an email which explains I have hearing loss but knowing the managers they don't tell the staff.

Thankfully the interpreters will be working for themselves soon so I won't have to deal with it anymore. I'll still get phone calls though asking for an 'insert-language-we-don't-do' when we have emailed them three times explaining the procedure, which makes me want to smack my head against a wall.