Please provide interior passenger cabin decibel levels on takeoff,
cruising, and landing for the planes listed below:

Cessna Citation V Ultra (7 passenger)
Cessna Citation Excel (7 passenger)
Raytheon Hawker 800XP (8 passenger)
Raytheon Hawker 1000 (9 passenger)
Cessna Citation X (8 passenger)
Dassault Falcon 2000 (9 passenger)

Please provide input for all parts of question on each type of plane.

---

Request for Question Clarification by bobbie7-ga on 15 Nov 2002 21:28 PST

Hello Frankdirect,
I received a reply from Cessna, saying that they  have one fixed
maximum level that is acceptable in all flight profiles before the
airplane can be delivered. Given the above, they only gave me the
maximum decibel levels for the Ultra, Excel and CX.
Thanks
Bobbie7-ga

Dear Frankdirect,

Thank you for accepting the information I located for you as an
answer. I am including the contact information for the Cessna
supervisor as well as he seems willing to answer any further inquires
you may have for these aircraft. In addition, I've compiled a number
of links with short excerpts to articles and reports related to
decibel levels and interior aircraft noise.

After mailing the three aircraft companies with your inquiry,
the following is what Timothy S. Garroutte, Customer Support Hot Line
Supervisor responded on Friday, November 15 2002:

“I understand you are requesting the cabin sound decibel levels for
the Citation Ultra, Excel, and CX.
 
Cessna does not have different requirements for different flight
profiles such as climb, cruise, and landing.  We have one fixed
Maximum level that is acceptable in all flight profiles before the
airplane can be delivered.  The maximum levels are as follows:
 
Ultra    79.5 dba
Excel    78.5 dba
CX       78.0 dba
 
I trust this will answer your question but please don't hesitate to
contact me if I can be of further service.
 
Regards,
 
Timothy S. Garroutte 
Customer Support Hot Line Supervisor 
316.517.8005 
tgarroutte@cessna.textron.com“  


Additional information that may interest you:

Here are cruising decibel levels for a number of aircraft:

“Just how noisy are our piston powered aircraft anyway.  Take a look
at the table.   The figures are based on 75% power (or as close as
possible) with the propeller at the lowest RPM setting as allowed by
the POH.  Altitude is 4,500Ft. Frequency is based on 110Hz. Keep in
mind each aircraft is different.”

1998  Cessna Model 182     90dB 
1967  Cessna Model 206     93dB 
1977  Piper Turbo Lance    86dB 
1979  Beech A36TC          87dB

Source: Avionics West Website
http://www.avionicswest.com/articles/soundofsilence.html

“Airline cabin noise varies depending on the type of plane, usually
between 95 and 105 decibels. Passengers seated in the back of the
plane may experience higher noise levels, and all passengers should be
aware that engine noise during take-off could be upward of 115
decibels.”
Source: National Institute of Deafness
http://www.drf.org/cms/index.cfm?displayArticle=21

Speech Interference Levels in Aircraft Interior Noise Measurement:
Their Use and Interpretation by Chris Brunt
http://www.armchair.com/sci/brunt1.html

Comfort studies on aircraft interior sound and vibration.
http://docserver.bis.uni-oldenburg.de/publikationen/dissertation/2001/quecom01/pdf/quecom01.pdf

Here is an excerpt from an article published at the Elliot Aviation
website addressing decibel levels at takeoff of a typical jet engine
aircraft:

“Some of the research has shown that although decibel levels vary,
depending upon the type of aircraft, the phase of the flight, the seat
position and other factors, the news is not good. Cabin noise levels
in a typical jet engine aircraft at takeoff were measured between 95
and 98 dB. A turboprop aircraft takeoff noise comes in at about 110
dB. Noise during cruise flight can reach 90 dB or more, depending on
the type and age of the aircraft being evaluated.”

Elliot Aviation has a toll free number you may call for more
information.
Call toll free: 877-456-3100

Source: Elliot Aviation Website
http://www.elliottaviation.com/consulting/consulting7.asp

Noise level comparison chart
http://www.elliottaviation.com/img/grbig200.asp

Elliott Aviation is providing this information about your aircraft,
from current market values to what other operators are saying about
their Falcons. Popular modifications, operational tips and articles of
interest are also included.
http://www.elliottaviation.com/falcon.asp

Hawker information
http://www.elliottaviation.com/hawker.asp

Citation Information
http://www.elliottaviation.com/citation.asp

Information for other aircraft.
http://www.elliottaviation.com/mycraft.asp


Search Criteria:

Cessna decibel levels
Dassault Falcon decibel levels
Raytheon Hawker decibel levels
Aircraft decibel levels
cabin sound decibel levels +aircraft
aircraft interior noise measurement

I hope you find this helpful. 

Best Regards,
Bobbie7-ga

Provided info but did not answer question as posed exactly.

I have sent emails to the manufacturers  asking your
question.  As soon as I get a reply, I will let you know.
 
Regards,
--Bobbie7-ga

Hello Frankdirect,

Here is the copy of the response from Cessna. The other companies did
not rrespond.

"I understand you are requesting the cabin sound decibel levels for
the Citation Ultra, Excel, and CX.
 
Cessna does not have different requirements for different flight
profiles such as climb, cruise, and landing.  We have one fixed
Maximum level that is acceptable in all flight profiles before the
airplane can be delivered.  The maximum levels are as follows:
 
Ultra    79.5 dba
Excel   78.5 dba
CX       78.0 dba
 
I trust this will answer your question but please don't hesitate to
contact me if I can be of further service.
 
Regards,

Customer Support Hot Line Supervisor "

Best Regards,
--Bobbie7-ga

bobbie7-ga:

You did not provide the input from Cessna.  What is the maximum level
for each plane.  If you can provide that, we'll close the question.

Thanks.