When looking for quality - meaning great performance and durability - in aviation microphones, it may be better to look at longevity of products than at what's new.

Take the 57 Series of microphones from Holmberg (Holmco) for instance.  Known as "The Legend", it has been in production since 1957 and can be found on early Airbus and on DC-9s and D-10s and a wide variety of other aircraft.  It's available in several versions, from standard (40mV/Pa) to high (120mV/Pa) sensitivity and with different plugs (PNR 85-13-X-01 and -02).

A more recent version is the 57 ET which is a noise-cancelling microphone with an electret element.   Using the Near/Far Field effect, this microphone is a lot more sensitive to sounds originating close to the microphone - i.e.  someone talking into it - than it is to the sounds further away - (the ambient noise of the aircraft). That means the mic needs to be held close to the mouth, in the 0-2 inch range.  Noise-cancelling microphones are therefore often called "Close Talk Microphones".  The 57 ET also comes in different sensitivities with different plugs to meet the specific requirements of the application. (PNR-85-13-X-03).   

So is there anything new?  Holmberg (Holmco) is now the supplier of the standard cockpit microphone (pictured at right) for the A320 family of Airbus aircraft.  PNR-85-16-11494-05 is a noise-cancelling electret microphone that fits existing cradles and connectors in the single-aisle Airbus cockpit.  It has a metal body for added durability, standard sensitivity (40mV/Pa) and comes with circuitry to counter 400Hz noise problems.

Erie Aviation, Inc. is pleased to offer these microphones, as well as complete repair services, including warranty, for these and other Holmberg (Holmco) products. 

Questions?  Please give us a call at 1-814-838-8934 or send us an email - info@erieaviation.com  

Questions about new products or services?
Please call or contact us: info@erieaviation.com