By Peter Damaske
If you take heed to track at domestic, you must have an acoustic impact on the subject of being within the live performance corridor. this is often accomplished via a sophisticated two-loudspeaker procedure and digital dealing with of the signs. how you can head-related sound replica and reception to get the unique influence is defined during this accomplished publication at the outer effect of listening to and the way to accomplish ideal stereo results. The booklet additionally introduces a idea of waft thresholds.
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Extra resources for Acoustics and Hearing
25 dB. When the compensation is switched on/off there are no cracks or jump-like changes of loudness. In the chain of stereo devices the filter is introduced right at the input of the power amplifier. It has its own power supply, and if the power is switched off the signal path is not interrupted. The explanation of further details seems to be unnecessary. 19 give a general impression of the device, showing the metal case and a section of the printed circuit board. 3 The Dummy Head In an article from the 1940s, the author found a photograph showing a dummy head mounted on top of the head of a person using headphones.
Consequently an accentuation in the bass range has to be taken into account. The proximity effect known from directional microphones has quite the same tendency, and special counteracting bass controls are installed in some microphones. Thus the roll-down at low frequencies need not be regarded as a disadvantage. It all depends on the purpose for which the dummy head will be used. The bass controls known from common stereo devices are well suited for adjusting the final frequency response as required.
6 Description of the Equipment 25 its frequency characteristic were eliminated arithmetically. The main axis of the microphone pointed to the loudspeaker examined; thus the directivity of a human ear was at least roughly imitated. The test signals consisted of sinusoidal tones. Their frequency was modulated in a range of 1/3 of an octave. This corresponds to the “frequency groups” made up by the ear when processing acoustical data. However, juxtaposed points in the diagram are distanced by 1/6 of an octave.
Acoustics and Hearing by Peter Damaske