CEA-2006-B-2009.pdf
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1、 CEA Standard Testing separate single and multi-channel amplifiers, integrated amplifiers and bandwidth-limited amplifiers that are connected to and rely solely on the vehicles primary electrical system for power input and have output power ratings of greater than 5 watts when measured in accordance
2、 with CEA-2006-B. See CEA-490-A for testing and measurement methods for those audio amplifiers that are not designed for in-vehicle applications. 2 References 2.1 Normative References The following standards contain provisions that, through reference in this text, constitute normative provisions of
3、this standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards listed in Section 2.1.1. 2.1.1 Nor
4、mative Reference List CEA-490-A, Testing and Measurement Methods for Audio Amplifiers, December 2004 IEC 60651, Sound Level Meters, October 2001 2.1.2 Normative Reference Acquisition CEA, IEC Standards: Global Engineering Documents, World Headquarters, 15 Inverness Way East, Englewood, CO USA 80112-
5、5776; Phone 800-854-7179; Fax 303-397-2740; Internet http:/; Email 2.2 Informative References 2.3 Informative References List AES17-1998 (r2004), AES Standard Method for Digital Audio Engineering Measurement of Digital Audio Equipment, March 3, 2004 2.3.1 Informative References Acquisition AES Stan
6、dards: Audio Engineering Society, Inc., International Headquarters, 60 East 42nd Street, Room 2520, New York, NY 10165-2520; Phone 212-661-8528; Fax 212-682-0477; Internet http:/www.aes.org/standards/ ; Email standardsaes.org 3 Symbols and Abbreviations AES Audio Engineering Society dB Decibel Hz He
7、rtz IEC International Electrotechnical Commission kHz Kilohertz Ohm +/- Plus or minus RMS Root Mean Square Copyright Consumer Electronics Association Provided by IHS under license with CEA Licensee=HP Monitoring/1111111164 Not for Resale, 04/07/2009 23:22:54 MDTNo reproduction or networking permitte
8、d without license from IHS -,-,- CEA-2006-B 2 THD Total Harmonic Distortion THD+N Total Harmonic Distortion plus Noise V Volt W Watt 4 Definitions 4.1 Power Amplifier A device whose purpose is to provide a larger output power than its required input power over the audio range or portion thereof, nor
9、mally construed to mean 20 Hz to 20 kHz. 4.2 Integrated Amplifier A power amplifier integrated into a device whose primary purpose is not power amplification. An integrated amplifier, for example, may be the amplifier contained in a head-unit whose primary purpose is media playback or an amplifier c
10、ontained in a signal processor whose primary purpose is equalization, filtering or multi-channel surround encoding or decoding. These examples are given for illustrative purposes and for purposes of clarification and are not intended to be all-inclusive. NOTEIn CEA-2006-B, the power amplifier sectio
11、n of a head-unit is considered an integrated amplifier. 4.3 Rated Characteristic A single value of a characteristic, such as power output, distortion, etc. claimed as representative of the performance of the product when measured in accordance with CEA- 2006-B. 4.4 Rated Frequency The frequency, mea
12、sured in Hz, at which the power amplifier is tested to measure other characteristics. NOTEThe Rated Frequency shall be stated in conjunction with the rated characteristic. 4.5 Rated Bandwidth The rated bandwidth shall be the frequency range between two stated values (e.g., 20 Hz to 20 kHz) over whic
13、h the power amplifier is tested to measure rated characteristics. NOTE: The rated bandwidth shall be stated with the rated characteristic. 4.6 Rated Load The load impedance with which the power amplifier is designed to operate and upon which other characteristics are based. NOTEThe Rated Load shall
14、be specified in any alternate or additional power rating measured in accordance with CEA-2006-B. 4.7 Rated Supply Voltage The supply voltage at which the power amplifier is tested to measure rated characteristics. NOTEThe Rated Supply Voltage shall be stated in conjunction with the rated characteris
15、tic. Copyright Consumer Electronics Association Provided by IHS under license with CEA Licensee=HP Monitoring/1111111164 Not for Resale, 04/07/2009 23:22:54 MDTNo reproduction or networking permitted without license from IHS -,-,- CEA-2006-B 3 4.8 Reference Load The load impedance with which the pow
16、er amplifier is tested in order to measure rated characteristics. NOTEThe Reference Load for primary power output ratings measured in accordance with CEA-2006-B shall be 4 X (1 +/- 5%) . 4.9 Reference Supply Voltage The supply voltage at which the power amplifier is tested to measure rated character
17、istics. NOTEThe Reference Supply Voltage for primary power output ratings measured in accordance with CEA-2006-B shall be 14.4 V dc +/- 0.2 V dc. 4.10 Reference Characteristic A single value of a characteristic that is used as a reference for the measurement of another characteristic (e.g., input se
18、nsitivity is a Reference Characteristic for a signal-to-noise measurement, or total harmonic distortion is a Reference Characteristic for total power output measurement). 4.11 Channel of Amplification, Bridged Channels A device containing at least one set of output terminals intended to power a loud
19、speaker(s) and that may incorporate any number of input terminals. An integrated amplifier, such as the amplifier incorporated in a head-unit or other device, may not have accessible input terminals. For the purposes of CEA-2006-B, amplifier channels incorporated in devices of this type are consider
20、ed channels of amplification, nonetheless. For a multichannel amplifier, bridging of channels is a condition where two (or more) channels of amplification are connected so that the channels operate as a single channel to provide additional output power when compared to a single channel. NOTEThe outp
21、ut power of bridged channels may be stated as an additional rating when the per-channel output power rating is stated. 4.12 Total Harmonic Distortion (THD) The percentage of total harmonic distortion of a sine wave of fundamental frequency, f, is numerically equal to the ratio of 100 times the squar
22、e root of the sum of the squares of the RMS voltages of each of the individual harmonics to the RMS voltage of the fundamental, expressed as a percentage. NOTEFor CEA rating purposes, all harmonics whose amplitudes exceed 10% of the amplitude of the strongest harmonic component of the fundamental fr
23、equency shall be included in the summation. 4.13 Total Harmonic Distortion Plus Noise (THD+N) The percentage of Total Harmonic Distortion plus Noise is defined as the sum of the total harmonic distortion and noise generated by the power amplifier, expressed as a percentage. 4.14 Power Output The Pow
24、er Output of a sinusoidal signal, expressed in watts, is the square of the output RMS voltage, measured with a voltmeter calibrated in true RMS at the power amplifiers output terminals, divided by the resistance of the load. Copyright Consumer Electronics Association Provided by IHS under license wi
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