Measurements

Fast Fourier Transformation

Today, Fast Fourier Transformation (FFT) based analyzer software is cheap or available for free. One such very nice and free program is REW (Room EQ Analyzer). It can do much more than analyze room acoustics, […]

David   Allgemein . Measurements
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Tube sound again

For objectivists the characteristics of tube amplification is mostly due to additional components of sound. Many tube lovers call it a higher purity of sound.Others again enjoy „easier listening“ in terms of warmer and maybeslightly […]

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Bits are Bits ?

Recently I was testing several solutions to reproduce audio files, based on personal computers. Just to see if bits are bits. I had been using JPLay for years (with mixed results in terms of stability or […]

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The Sound of Tubes ?

At TestHiFi we discuss and develop ways to measure aspects of music reproduction. Sometimes, working on my own loudspeaker projects, such aspects draw attention. About such an event I want to write this time. When […]

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Faint sounds of distortion

Did you ever hear the noise produced by an audio amplifier under measurement, with resitors instead of loudspeakers connected? There is a lot of buzz, and sometimes hum. If components in an audio circuit produce […]

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Phase and Time 3

 Text to speech  –  TestHiFi blog: Phase and Time 3 Phase and Time – Time Domain Response, Step Response In my first blog „Phase and Time 1“ I focused on amplitude and phase shown as […]

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Music, Loudspeakers and Measurements

I remember the moment when, late in childhood, after about 10 years of piano playing, I made a decision. After hearing a very impressive piano player I thought I would never be in that league. […]

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Listening Position Measurements

Measurements at the listening position are nice to achieve a quick „objective“ sound quality documentation of an audio system. Let’s have a look at the basics. John Atkinson of Stereophile magazine keeps a certain procedure […]

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Loudspeaker Measurements – Part 1

Part 1 – loudspeaker time domain and 1 m data I would like to show some real nearfield and farfield measurements to underline my last blog about basic loudspeaker „frequency response“ measurements. As always, be […]

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Measuring Loudspeakers – intro

For me as a loudspeaker designer and acoustician measuring loudspeakers is mostly about the far field pressure response (magnitude and phase). With such measurements we can determine frequency domain characteristics like the on-axis and off-axis […]

David   Measurements
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