Air carrier X has communication problem with las tower and approach control.

Attributes
ACN	286258
Time
Date	199410
Day	Mon
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : las
State Reference	NV
Altitude	msl bound lower : 11000 msl bound upper : 11000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : las tower : las
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	descent : approach landing other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 12000 flight time type : 600
ASRS Report	286258
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : unable
Consequence	Other
Supplementary
Primary Problem	Navigational Facility
Air Traffic Incident	other

Narrative:

Las approach, tower, and often ground have a transmitter problem. Except for 1 female controller, the relative loudness of las controllers in aircraft receivers is considerably lower than that of other aircraft. This condition has existed for several yrs. My hearing is not what it once was : loud sounds bother ! Tonight, we followed an air carrier Y into las. With approach control barely audible, Y's xmissions (a deep booming voice) were absolutely painful! On tower frequency, the difference was far more pronounced! With tower volume adjusted to the absolute minimum for safe audibility, other users were at the threshold of pain! Y's last 2 xmissions were beyond the pain threshold, almost to the level of nausea! Las needs to boost power, or reset modulation, or relocate antenna, or get airplanes to wiggle wings in response.

Original NASA ASRS Text

Title: ACR X HAS COM PROB WITH LAS TWR AND APCH CTL.

Narrative: LAS APCH, TWR, AND OFTEN GND HAVE A XMITTER PROB. EXCEPT FOR 1 FEMALE CTLR, THE RELATIVE LOUDNESS OF LAS CTLRS IN ACFT RECEIVERS IS CONSIDERABLY LOWER THAN THAT OF OTHER ACFT. THIS CONDITION HAS EXISTED FOR SEVERAL YRS. MY HEARING IS NOT WHAT IT ONCE WAS : LOUD SOUNDS BOTHER ! TONIGHT, WE FOLLOWED AN ACR Y INTO LAS. WITH APCH CTL BARELY AUDIBLE, Y'S XMISSIONS (A DEEP BOOMING VOICE) WERE ABSOLUTELY PAINFUL! ON TWR FREQ, THE DIFFERENCE WAS FAR MORE PRONOUNCED! WITH TWR VOLUME ADJUSTED TO THE ABSOLUTE MINIMUM FOR SAFE AUDIBILITY, OTHER USERS WERE AT THE THRESHOLD OF PAIN! Y'S LAST 2 XMISSIONS WERE BEYOND THE PAIN THRESHOLD, ALMOST TO THE LEVEL OF NAUSEA! LAS NEEDS TO BOOST PWR, OR RESET MODULATION, OR RELOCATE ANTENNA, OR GET AIRPLANES TO WIGGLE WINGS IN RESPONSE.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.