F.A.Q.

About the characteristics of headphone

• The main characteristics of the headphones
• Frequency response
• Frequency response
• Headphone frequency range
• Headphone Sensitivity
• The magnitude of the frequency response graphs headphone RAA
• Subjective perception of the frequency response
• What are the frequency response: light, dark, V-shaped, smooth ...
• Features of tuning the frequency response of headphones in the low frequency range
• How does the frequency response of the headphones depend on the stands?
  • Type 4.3 artificial ear - exprimental
• Target curve
• Target curve RAA v1 for headphones
• Why is the Harman target curve not recognized and what to do about it?
• Headphone frequency response curves of equal loudness
• Examples of the use of graphics in practice
• Adjusting the frequency response MathAudio Headphone EQ of the graphs
• Vacuum Tube Player with the ability to compensate and imitate headphones
• Impulse responce
• Сumulative decay spectrum (Waterfall)
• What does the frequency response and group delay graphs consist of?
• Maximum Power Input
• What determines the cost of measuring equipment

On-line checking headphones

• Description of test signals
• Check headphones for defects

About headphone measurements in RAA

• How headphones are tested in RAA
• Headphone Measurement Equipment in RAA
• HDM-X Stand
• Type 4.3 artificial ear - exprimental Stand
• IEC 60711 / IEC 60318-4 / ITU-T P.57 Type 2 Stand
• HDM1 Stand
• SF1 Stand
• Siec Stand
• Human Stand
• Flat Stand
• Cx Stands
• miniDSP EARS Stand
• Binaural Enthusiast B1-E Dummy Head Stand
• About amplifier compensation

Amplifier and headphone impedance interaction

• The frequency response of the interaction impedance amplifier and headphones
• Examples with frequency response in bundles headphones + amplifier
• How calculate own reference SPL
• Subjective test for the quality of the headphone wire
• Checking the quality of the headphone cable via foobar2000
• Checking the quality of the headphone cable for channel penetration using test tracks
• Calculating the Crosstalk of headphones

About measuring the interaction of headphones and amplifiers in RAA

• Headphones and AMPs compatibility analysis table
• AMPs and Headphones compatibility analysis table
• Examples of the most impedances of headphone and amplifier

• Differences between miniature USB DACs and stationary DACs with headphone amplifiers
• Dependence of the transfer characteristic and nonlinear distortions
• Introductory part
• Limitation of the waveform in the region of maximum amplitudes
• Dependence of the form and graphs
• Additional types of graphs
• Audibility of subjective harmonics
• Subjective perception
• How to reduce distortion, the conditions for minimal audibility of distortion
• Distortions of the waveform in the region of minimum amplitudes
• Waveform distortions over the entire amplitude range
• Dependence of the form and graphs
• Subjective perception
• How to reduce distortion, the conditions for minimal audibility of distortion
• Waveform distortions at medium amplitudes
• Features of the signal-to-noise parameter
• A common technique for measuring the signal-to-noise ratio in RAA for DACs and amplifiers
• Signal-to-noise measurement in REW
• Setting up a notch filter in REW using the E1DA Cosmos APU as an example
• What is the spectrum and what does the level of the noise shelf depend on?
• What is Overload / Clipping
• Lack of earth loops when measuring
• The minimum introduced error from ADC at measurements
• On the normalized harmonic distortion

• OS system mixer - signal path from the player to the DAC
• Listen to the degradation of the sound quality from the system mixer
• Why non-audios need Hi-Res Audio?
• Why can wireless bluetooth headphones sound better than wired headphones?
• How to properly listen to music on your computer - set up Foobar2000
• Setting up support for VST effects in Foobar2000
• NOS R2R simulator
• MSEB from Hiby

• Markers and frequency response editing tools
• Marker Info
• Marker - Range Information / Start - End
• Range / Correction
• Range / Correction smoothing
• Correction - Cut
• Correction of ISO 226-2009
• Correction - Amplifier according to individual parameters
• Correction function between SIEC and 711 stands

• Subjective and objective approach to sound quality assessment
• About decibels
• How to listen to the relative volume in decibels

• How to use the RAA website
• Laboratory and hardware and software RAA complex
• report for a pro
• Reports for beginners
• Comparison services
• Automatic selection of chracteristics