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08

2011-Dec

 Measurements Samsung Nexus S

Nick Name: Golden Ears Registered Date: Dec 08, 2011, 22:17:13 IP ADRESS: *.56.123.5 Views: 18800

00.Samsung_Nexus_S_measure.jpg

  

 

Related Articles

* Golden Ears Philosophy

* How we measure (Phones, DAPs, Amplifiers)

* How to read measurements - Phones, DAPs, Amplifiers

* Distortion and the Data

* Frequency response & perceived sound 

 

 

Note.

Please keep in mind that the following data are from a test unit reviewed by Golden Ears - the test unit is not necessarily a representative sample of the model being reviewed.

 

Decoder Test

 1. WAV Test Result (Lossless File) 

01.FR_WAV.png

Sampling Frequency : 44.1kHz / Samsung - Nexus S

 

02.TBL_WAV.png

Test Mode : 24bit, 44.1kHz

 

 

2. AAC Test Result

03.FR_AAC.png

Sampling Frequency : 44.1kHz / Samsung - Nexus S

 

04.TBL_AAC.png

Test Mode : 24bit, 44.1kHz

 

 

3. OGG Test Result

07.FR_OGG.png

Sampling Frequency : 44.1kHz / Samsung - Nexus S

 

08.TBL_OGG.png

Test Mode : 24bit, 44.1kHz

 

 

4. MP3 Test Result

05.FR_MP3.png

Sampling Frequency : 44.1kHz / Samsung - Nexus S

 

06.TBL_MP3.png

Test Mode : 24bit, 44.1kHz

 

 

Amplifier Test

A given headphone output may accommodate many different headphones - in general, a smaller load impedance (on headphones) will lead to a larger sound, but at cost of accuracy in measurable data due to the increased current - this cost usually manifests in an increasingly weak bass and elevated crosstalk values as the load impedance decreases. The purpose of the tests to follow is to see how these values change as a function of impedance.

  

 

09.FR_LOAD.png

R62:62Ω / R250:250Ω

Sampling Frequency : 44.1kHz / Samsung - Nexus S

 

10.TBL_LOAD.png

R62:62Ω / R250:250Ω

Test Mode : 24bit, 44.1kHz

  

 

Output Impedance

A lower impedance is desirable on the headphone outputs of amplifiers. The output impedance is closely related to the damping factor, and is one of the most important parameters that determine headphones' performance - desktop amps tend to exhibit high impedance values, corresponding to poor performance.

 

* Interaction between output impedance and phones 

 

 11.IG.PNG

 

 Creative Commons License
Images, text and measured data by Golden Ears Corporation is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License.

 

Golden Ears Test System - for more information (Link)
1. HATS: Bruel & Kjær - Head and Torso Simulator Type 4128C
2. Microphone Amplifier: Bruel & Kjær - NEXUS Conditioning Amplifier 
3. Audio Interface: Lynx L22
4. DAC: Golden Ears D/A Converter
5. Headphone Amplifier: Golden Ears Headphone Amplifier 

How we test
1. Headphone / Earphone
2. Speaker
3. Amplifier / DAP
 

How to read G.E. Graph
1. Earphone / Headphone
2. Speaker (Directivity Pattern)
3. DAP / Amplifier

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