content: SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C. 20549
  
  
                                   FORM 8-K
  
  
                                CURRENT REPORT
                Pursuant to Section 13 or 15(d) of the Securities
                             Exchange Act of 1934
  
  
     Date of Report (Date of earliest event reported): April 13, 2006
  
  
                              SONEX RESEARCH, INC.
                (Exact name of registrant as specified in Charter)
  
  
           Maryland                  000-14465              52-1188993
        (State or other           (Commision file         (IRS employer
        jurisdiction of               number)           identification no.)
         incorporation)
  
  
                       23 Hudson Street, Annapolis, MD 21401
                      (Address of principal executive offices)
  
  
                                (410) 266-5556
               (Registrant's telephone number, including area code)
  
  
                                      N/A
           (Former name or former address, if changed since last report)
  
  
  
  Check  the  appropriate  box  below  if the  Form  8-K  filing  is  intended  to
  simultaneously  satisfy the filing obligation of the registrant under any of the
  following   provisions  (see  General  Instruction  A.2.  below):
  
  [ ]  Written communications  pursuant to Rule 425 under the Securities Act
       (17 CFR 230.425)
  [ ]  Soliciting  material  pursuant to Rule 14a-12  under the Exchange Act
       (17 CFR 240.14a-12)
  [ ]  Pre-commencement communications pursuant to Rule 14d-2(b) under the
       Exchange  Act (17 CFR  240.14d-2(b))
  [ ]  Pre-commencement communications pursuant to Rule 13e-4(c) under the
       Exchange Act (17 CFR 240.13e-4(c))
  
  
  
  
  
  
  ITEM 8.01 - OTHER EVENTS
  
  On April 13, 2006, the  Registrant  posted the following  announcement  on its
  website (www.sonexresearch.com):
  
  
  SONEX RECEIVES EXTENSIONS ON $179,500 NOTES PAYABLE TO SHAREHOLDERS
  
  
  ANNAPOLIS,  MARYLAND, April 13, 2006 - SONEX RESEARCH, INC. (OTC SONX) announced
  it has  received  extensions  until  December 31, 2006 of the due dates on notes
  payable to shareholders  totaling $179,500.  One note in the principal amount of
  $95,000 is payable to Sidney L. Gulick, 3d of Adelphi,  MD, and two notes in the
  aggregate  principal  amount of $84,500  are  payable  to  Michael I.  Keller of
  Alexandria,  VA, the consultant who serves as the Company's Director of Business
  Development and Program Manager.
  
  The notes bear interest at 6%, and all interest  payments have been made through
  March 31, 2006.  In addition to interest  payments in each quarter of this year,
  the Company  expects to make  partial  principal  payments on the notes prior to
  December 31, 2006 as cash flow permits.
  
  Payment of the notes is secured by a shared  security  interest in the Company's
  patents. A note due to Mr. Keller in the principal amount of $67,000 is included
  among Company  compensation and other financial  obligations  totaling  $543,786
  which are secured by a priority security interest, while the $95,000 note due to
  Dr. Gulick and a $17,500 note to Mr. Keller are included among  compensation and
  other  financial   obligations   totaling   $614,120  which  are  secured  by  a
  subordinated security interest.
  
  The  Company's  management  expresses its gratitude to Dr. Gulick and Mr. Keller
  for their financial  assistance and their willingness to extend the due dates of
  the  notes.  In  addition,  management  thanks  Mr.  Keller  on  behalf of Sonex
  shareholders  for continuing to defer payment of his  compensation to reduce the
  Company's current cash requirements.
  
  
  Contact:  George E. Ponticas,  CFO, Sonex  Research,  Inc.,  tel:  410-266-5556,
  email: george.ponticas@sonex-na.com, website: www.sonexresearch.com.
  
  
  About Sonex
  
  Sonex  Research,  Inc.,  a leader  in the  field of  combustion  technology,  is
  developing its patented Sonex Combustion  System (SCS)  piston-based  technology
  for in-cylinder  control of ignition and  combustion,  designed to increase fuel
  mileage and reduce  emissions  of internal  combustion  engines.  Sonex plans to
  complete  development,  commercialize  and  market  its  Sonex  Controlled  Auto
  Ignition (SCAI)  combustion  process to the automotive  industry to improve fuel
  efficiency of gasoline powered vehicles.  Additionally,  independent third-party
  testing has confirmed the potential of the SCS application  for  direct-injected
  diesel  engines  to  significantly   reduce  harmful  soot  in-cylinder  without
  increasing  fuel  consumption.  Other  SCS  designs  are being  used to  convert
  gasoline engines of various sizes to operate on safer, diesel-type "heavy fuels"
  for use in military and commercial  applications requiring light weight and safe
  handling and storage of fuel, such as in UAVs (unmanned aerial vehicles).
  
  
  CAUTION REGARDING FORWARD-LOOKING STATEMENTS
  
  "Forward-looking"  statements  contained in this report, as well as all publicly
  disseminated  material about the Company, are made pursuant to the "safe harbor"
  provisions of the Private  Securities  Litigation Act. Such statements are based
  on current  expectations,  estimates,  projections and assumptions by management
  with respect to matters such as commercial acceptance of the SCS technology, the
  impact of  competition,  and the  Company's  financial  condition  or results of
  operations.  Readers are cautioned tha t such  statements  are not guarantees of
  future  performance and involve risks and uncertainties  that could cause actual
  results to differ  materially from those  expressed in any such  forward-looking
  statements.
  
  
  RISK FACTORS
  
  Additional  information  regarding  the risks  faced by Sonex is provided in the
  Company's  periodic  filings with the Securities and Exchange  Commission  (SEC)
  under the heading "Risk  Factors".  Such filings are available upon request from
  the Company or online in the SEC's EDGAR database at  www.sec.gov.  The Company,
  however,  is delinquent in its filings with the SEC. It has not filed its Annual
  Reports on Form 10-KSB for the years ended December 31, 2004 and 2005 because it
  lacks the financial resources to eng age its independent  accountants to conduct
  audits of the December 31, 2004 and 2005  financial  statements,  and because it
  lacks the  staffing to prepare  the Form 10-KSB  itself due in large part to the
  amount of time  management has spent in responding to  litigation.  For the same
  reasons,  the  Company  has been  unable to file its  Quarterly  Reports on Form
  10-QSB for March 31, 2005,  June 30, 2005 and September 30, 2005. The Company is
  unable to predict when it will be able to make these filings and there can be no
  assurance  that the filings  will be made at all. In  addition,  there can be no
  assurance  that a public market for the Company's  Common Stock will continue to
  exist.
  
  
                                   ###
  
  
  SIGNATURES
  
  Pursuant  to the  requirements  of the  Securities  Exchange  Act of  1934,  the
  registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
  undersigned hereunto duly authorized.
  
  
  April 13, 2006
  
  
  SONEX RESEARCH, INC.
  Registrant
  
  
  
  /s/ George E. Ponticas
  ----------------------
  George E. Ponticas
  Chief Financial Officer and Secretary
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text: SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C. 20549
  
                                   FORM 8-K
  
                                CURRENT REPORT
                Pursuant to Section 13 or 15(d) of the Securities
                             Exchange Act of 1934
  
     Date of Report (Date of earliest event reported): April 13, 2006
  
                              SONEX RESEARCH, INC.
                (Exact name of registrant as specified in Charter)
  
           Maryland                  000-14465              52-1188993
        (State or other           (Commision file         (IRS employer
        jurisdiction of               number)           identification no.)
         incorporation)
  
                       23 Hudson Street, Annapolis, MD 21401
                      (Address of principal executive offices)
  
                                (410) 266-5556
               (Registrant's telephone number, including area code)
  
                                      N/A
           (Former name or former address, if changed since last report)
  
  Check  the  appropriate  box  below  if the  Form  8-K  filing  is  intended  to
  simultaneously  satisfy the filing obligation of the registrant under any of the
  following   provisions  (see  General  Instruction  A.2.  below):
  
  [ ]  Written communications  pursuant to Rule 425 under the Securities Act
       (17 CFR 230.425)
  [ ]  Soliciting  material  pursuant to Rule 14a-12  under the Exchange Act
       (17 CFR 240.14a-12)
  [ ]  Pre-commencement communications pursuant to Rule 14d-2(b) under the
       Exchange  Act (17 CFR  240.14d-2(b))
  [ ]  Pre-commencement communications pursuant to Rule 13e-4(c) under the
       Exchange Act (17 CFR 240.13e-4(c))
  
  ITEM 8.01 - OTHER EVENTS
  
  On April 13, 2006, the  Registrant  posted the following  announcement  on its
  website (www.sonexresearch.com):
  
  SONEX RECEIVES EXTENSIONS ON $179,500 NOTES PAYABLE TO SHAREHOLDERS
  
  ANNAPOLIS,  MARYLAND, April 13, 2006 - SONEX RESEARCH, INC. (OTC SONX) announced
  it has  received  extensions  until  December 31, 2006 of the due dates on notes
  payable to shareholders  totaling $179,500.  One note in the principal amount of
  $95,000 is payable to Sidney L. Gulick, 3d of Adelphi,  MD, and two notes in the
  aggregate  principal  amount of $84,500  are  payable  to  Michael I.  Keller of
  Alexandria,  VA, the consultant who serves as the Company's Director of Business
  Development and Program Manager.
  
  The notes bear interest at 6%, and all interest  payments have been made through
  March 31, 2006.  In addition to interest  payments in each quarter of this year,
  the Company  expects to make  partial  principal  payments on the notes prior to
  December 31, 2006 as cash flow permits.
  
  Payment of the notes is secured by a shared  security  interest in the Company's
  patents. A note due to Mr. Keller in the principal amount of $67,000 is included
  among Company  compensation and other financial  obligations  totaling  $543,786
  which are secured by a priority security interest, while the $95,000 note due to
  Dr. Gulick and a $17,500 note to Mr. Keller are included among  compensation and
  other  financial   obligations   totaling   $614,120  which  are  secured  by  a
  subordinated security interest.
  
  The  Company's  management  expresses its gratitude to Dr. Gulick and Mr. Keller
  for their financial  assistance and their willingness to extend the due dates of
  the  notes.  In  addition,  management  thanks  Mr.  Keller  on  behalf of Sonex
  shareholders  for continuing to defer payment of his  compensation to reduce the
  Company's current cash requirements.
  
  Contact:  George E. Ponticas,  CFO, Sonex  Research,  Inc.,  tel:  410-266-5556,
  email: george.ponticas@sonex-na.com, website: www.sonexresearch.com.
  
  About Sonex
  
  Sonex  Research,  Inc.,  a leader  in the  field of  combustion  technology,  is
  developing its patented Sonex Combustion  System (SCS)  piston-based  technology
  for in-cylinder  control of ignition and  combustion,  designed to increase fuel
  mileage and reduce  emissions  of internal  combustion  engines.  Sonex plans to
  complete  development,  commercialize  and  market  its  Sonex  Controlled  Auto
  Ignition (SCAI)  combustion  process to the automotive  industry to improve fuel
  efficiency of gasoline powered vehicles.  Additionally,  independent third-party
  testing has confirmed the potential of the SCS application  for  direct-injected
  diesel  engines  to  significantly   reduce  harmful  soot  in-cylinder  without
  increasing  fuel  consumption.  Other  SCS  designs  are being  used to  convert
  gasoline engines of various sizes to operate on safer, diesel-type "heavy fuels"
  for use in military and commercial  applications requiring light weight and safe
  handling and storage of fuel, such as in UAVs (unmanned aerial vehicles).
  
  CAUTION REGARDING FORWARD-LOOKING STATEMENTS
  
  "Forward-looking"  statements  contained in this report, as well as all publicly
  disseminated  material about the Company, are made pursuant to the "safe harbor"
  provisions of the Private  Securities  Litigation Act. Such statements are based
  on current  expectations,  estimates,  projections and assumptions by management
  with respect to matters such as commercial acceptance of the SCS technology, the
  impact of  competition,  and the  Company's  financial  condition  or results of
  operations.  Readers are cautioned tha t such  statements  are not guarantees of
  future  performance and involve risks and uncertainties  that could cause actual
  results to differ  materially from those  expressed in any such  forward-looking
  statements.
  
  RISK FACTORS
  
  Additional  information  regarding  the risks  faced by Sonex is provided in the
  Company's  periodic  filings with the Securities and Exchange  Commission  (SEC)
  under the heading "Risk  Factors".  Such filings are available upon request from
  the Company or online in the SEC's EDGAR database at  www.sec.gov.  The Company,
  however,  is delinquent in its filings with the SEC. It has not filed its Annual
  Reports on Form 10-KSB for the years ended December 31, 2004 and 2005 because it
  lacks the financial resources to eng age its independent  accountants to conduct
  audits of the December 31, 2004 and 2005  financial  statements,  and because it
  lacks the  staffing to prepare  the Form 10-KSB  itself due in large part to the
  amount of time  management has spent in responding to  litigation.  For the same
  reasons,  the  Company  has been  unable to file its  Quarterly  Reports on Form
  10-QSB for March 31, 2005,  June 30, 2005 and September 30, 2005. The Company is
  unable to predict when it will be able to make these filings and there can be no
  assurance  that the filings  will be made at all. In  addition,  there can be no
  assurance  that a public market for the Company's  Common Stock will continue to
  exist.
  
                                   ###
  
  SIGNATURES
  
  Pursuant  to the  requirements  of the  Securities  Exchange  Act of  1934,  the
  registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
  undersigned hereunto duly authorized.
  
  April 13, 2006
  
  SONEX RESEARCH, INC.
  Registrant
  
  /s/ George E. Ponticas
  ----------------------
  George E. Ponticas
  Chief Financial Officer and Secretary