August 30, 2017 by Mixcder
The back of your over ear headphone's box or instruction manual is covered in specifications designed to assist audiophiles and audio junkies in selecting the right pair of cans – just like anything else you shop for. But unlike that carton of milk or bag of cookies, the specs on the packaging aren't that easy to understand. For that reason, we will help you with one of the essentials – understanding headphone frequency response.
Headphone frequency response is the range of bass, mid, and treble measured in Hertz (Hz).
Low Bass (LFE range – Low Frequency Effects) 10Hz – 50Hz
Musical Bass (bass guitar, kick drum, orchestral bass) 50Hz – 100Hz
Upper Bass (male vocals & directional bass) 100Hz – 200Hz
Midrange (most instruments, vocal dialogue, on-screen effects) 200Hz – 4000Hz
Treble (cymbals, triangles, hissing "s" in speech) 4,000Hz – 20,000Hz
The range associated with your Bluetooth stereo headset describes the range in which the drivers are able to provide clear, distortion-free audio to your ears. The range most commonly found on your headphone specs sheet is 20Hz to 20,000Hz. The first number indicates the bass while the second number indicates the treble. This range is essentially the standard because it represents the normal audible musical frequency range heard by humans. Humans feel them. It is important to note that an extended frequency response range is not indicative of the headphone's sound quality.
So, now that you understand what a headphone frequency response is, let's go over understanding headphone frequency response graphs. Often times reviewers use graphs to illustrate how great or poor is. You can better understand how well the headphone may perform by understanding how to read the graph. Again, this is not the only indication of how good a headphone is.
In theory, the line on a frequency response graph should be relatively flat line since the range demonstrates the headphone's ability to reproduce all frequencies equally. A "natural sounding" headphone is said to be slightly higher in the bass between 40Hz and 500Hz. That's where bass instruments and deep male vocals live, remember?!
If the line on the graph is slightly higher on the left side that means the headphones produce sound with more bass response. If the right side of the graph is higher than the left, that means the wireless headphones have a greater response in the mid, highs, and treble. That headset would be considered bright.
Bluetooth headphones have to compensate for the drivers being so close to the ear in the highs, so the highs are "rolled-off" and illustrated by a gradual sloping flat line from 1kHz to about 8-10dB down to 20kHz. In addition, small spikes at higher frequencies are normal as that is due to reflection cancellations in the folds and ridges in the outer part of the ear. But, sharp spikes in frequency (peaks and deep valleys) over 3,000Hz or so are indications of when the headphone sounds harsh.
This article is reproduced from Understanding Headphone Frequency Response
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