To describe a practical and reproducible method of determining the loudness ratings of telephone connections. Loudness ratings may be measured directly using appropriate test instruments and facilities, as specified in this standard, or may be computed using the amplitude-frequency characteristic of the connection measured in accordance with IEEE Std 269-1971. .
- Standard Committee
- COM/SDB - Standards Development Board
- Status
- Inactive-Reserved Standard
- Board Approval
- 1978-06-16
- History
-
- ANSI Approved:
- 1983-02-15
- Published:
- 1979-11-29
- Reaffirmed:
- 2008-09-26
- Inactivated Date:
- 2019-11-07
Additional Resources
- Erratas
- 661-1979_errata.pdf
Working Group Details
- Society
- IEEE Communications Society
- Standard Committee
- COM/SDB - Standards Development Board
- Working Group
-
CEA - Working Group on Communication Electroacoustics
- IEEE Program Manager
- Tom Thompson
Contact Tom Thompson - Working Group Chair
- John Bareham
Other Activities From This Working Group
Current projects that have been authorized by the IEEE SA Standards Board to develop a standard.
P269
Standard for Evaluating Electroacoustic Performance of Communication Devices
This standard provides methods for evaluation of electroacoustic devices that enable speech communication. These devices include handsets, headsets, and speakerphones, or incorporate microphones and speakers to provide a speech communication function. The standard is applicable to speech communication terminals that connect to any network, as well as to electroacoustic subsystems that connect to a terminal by any means. Due to the various characteristics of terminals and subsystems and the environments in which they operate, not all of the test procedures in this standard are applicable to all types of devices. Guidance for the applicability of specific tests is given within this standard. This standard does not apply to voice recognition systems such as speech-to-text, text-to-speech, or speech-to-command functions.
Standards approved by the IEEE SA Standards Board that are within the 10-year lifecycle.
1652-2016
IEEE Standard for Translating Head and Torso Simulator Measurements from Eardrum to Other Acoustic Reference Points
The data and rationale for translating head and torso simulator measurements from eardrum to other acoustic reference points such as free field and diffuse field are provided in this standard.
269-2019
IEEE Standard for Measuring Electroacoustic Performance of Communication Devices
Practical methods for making electroacoustic laboratory measurements of analog and digital speech communications terminals and connected audio devices are contained in this standard. The methods are applicable to a wide variety of wired, wireless, cordless, and mobile communication terminals. Examples include Voice over Internet Protocol (VoIP), Wi-Fiu00ae, and softphone devices. Tests applicable to connected audio devices such as wired, Bluetoothu00ae, and universal serial bus (USB) handsets, headsets, and wearables are included. The standard contains objective metrics, subjective metrics, and subjective metric predictors. Application is in the frequency range from 20 Hz to 20 kHz.
These standards have been replaced with a revised version of the standard, or by a compilation of the original active standard and all its existing amendments, corrigenda, and errata.
1027-1984
IEEE Trial-Use Standard Method for Measuring the Magnetic Field Intensity Around a Telephone Receiver
A practical method for determining the magnetic-field characteristics of a telephone receiver by means of objective measurements in a test connection is described. The method was developed in response to a need to specify the magnetic field at selected locations around a telephone receiver, required for satisfactory coupling of hearing aids. However, the method is sufficiently general to allow complete mapping of the magnetic field. It is also useful for other applications where knowledge of the magnetic field intensity is required.
1652-2008
IEEE Standard for the Application of Free Field Acoustic Reference to Telephony Measurements
This standard provides the techniques and rationale for referencing acoustic telephony measurements to the free field. It applies to ear related measurements such as receive, sidetone and overall.
269-1983
IEEE Standard Method for Measuring Transmission Performance of Telephone Sets
The methods that are used to measure telephone-set transmission performance may be divided into two classes: objective methods and subjective methods. The objective methods, which are those discussed in this standard, utilize a sound source resembling the human mouth to drive the transmitter, and an acoustic coupler resembling the human ear as a termination for the receiver. The sound source comprises a source of electrical energy and a moving-coil loudspeaker unit having supplementary electrical and acoustical components which produce a sound field simulating that of a typical human voice. This special loudspeaker is referred to as an artificial mouth. The acoustic coupler comprises a microphone and a terminating air volume having supplementary acoustic components which produce a load on the receiver simulating that of a typical human ear. This coupler is referred to as an artificial ear. The artificial mouth and ear are useful in comparing the performance of telephone sets at frequencies in the significant portion of the speech range.
269-1992
IEEE Standard Methods for Measuring Transmission Performance of Analog and Digital Telephone Sets
Superseded by IEEE Std 269-2002. Practical methods for measuring the transmission characteristics of both digital and conventional to wire analog telephone sets by means of objective measurements on a test connection are described. The test results thus obtained may be used as a means of evaluating or specifying the transmission performance of a telephone set on a standardized basis. The measurements are applicable to telephone sets incorporating carbon or linear transmitters. Measurements are over the frequency range most useful for speech: 100-5000 Hz. The test methods are not intended to be applicable to special devices, such as noise-exclusion transmitters, distant-talking transmitters, insert-type receivers, or noise-exclusion receivers equipped with large ear pads.
269-2002
IEEE Standard Methods for Measuring Transmission Performance of Analog and Digital Telephone Sets, Handsets, and Headsets
Practical methods for making laboratory measurements of electroacoustic characteristics of analog and digital telephones, handsets, and headsets are provided in this revised standard. The methods may also be applicable to a wide variety of other communications equipment, including cordless, wireless, and mobile communications devices. Measurement results may be used to evaluate these devices on a standardized basis. Application is in the frequency range 100-8500 Hz.
269-2010
IEEE Standard Methods for Measuring Transmission Performance of Analog and Digital Telephone Sets, Handsets, and Headsets
Practical methods for making laboratory measurements of electroacoustic characteristics of analog and digital telephones, handsets and headsets. The methods may also be applicable to a wide variety of other communications equipment, including cordless, wireless and mobile communications devices. Measurement results may be used to evaluate these devices on a standardized basis. Application is in the frequency range from 100 Hz to 8500 Hz. This edition incorporates IEEE Std 269a-2007. Other substantive changes have been made since the 2002 edition. This document contains sound files. If not delivered with PDF, are available at http://standards.ieee.org/downloads/269/269-2010/
269a-2007
IEEE Standard Methods for Measuring Transmission Performance of Analog and Digital Telephone Sets, Handsets, and Headsets Amendment 1
This document amends IEEE Std 269-2002.
269a-2012
IEEE Standard Methods for Measuring Transmission Performance of Analog and Digital Telephone Sets, Handsets, and Headsets--Amendment 1
Practical methods for making laboratory measurements of electroacoustic characteristics of analog and digital telephones, handsets, and headsets are presented. The methods may also be applicable to a wide variety of other communications equipment, including cordless, wireless, and mobile communications devices. Measurement results may be used to evaluate these devices on a standardized basis. Application is in the frequency range from 100 Hz to 8500 Hz.
These standards have been removed from active status through a ballot where the standard is made inactive as a consensus decision of a balloting group.
1027-1996
IEEE Standard Method for Measurement of the Magnetic Field in the Vicinity of a Telephone Receiver
The methodology for measuring the magnetic field strength in the vicinity of a telephone receiver is described.
These standards are removed from active status through an administrative process for standards that have not undergone a revision process within 10 years.
1329-2010
IEEE Standard Method for Measuring Transmission Performance of Speakerphones
This standard provides techniques for objective measurement of electroacoustic and voice-switching characteristics of speakerphones that connect directly or indirectly to an analog or digital telephone network. Due to the various characteristics of speakerphones and the environments in which they operate, not all of the test procedures in this standard are applicable to all speakerphones. Application of the test procedures to atypical speakerphones should be determined on an individual basis.