Old technology in a new form:
http://www.atcsd.com/site/content/view/34/47/
Its response measured. The only one source is here at diyaudio ;-)
http://www.atcsd.com/site/content/view/34/47/
Its response measured. The only one source is here at diyaudio ;-)
Attachments
The chart has the following axis:
I am familiar with 1watt / 1 Meter term
I am familiar with 2.83V / 1 Meter term, (not the same as above if impedance is not 8 ohms)
Not familiar with this term.
What is the norm for this measurement? Should the ideal line be flat, or is it some kind of power measurement where the ideal line should be sloping down?
I am familiar with 1watt / 1 Meter term
I am familiar with 2.83V / 1 Meter term, (not the same as above if impedance is not 8 ohms)
Not familiar with this term.
What is the norm for this measurement? Should the ideal line be flat, or is it some kind of power measurement where the ideal line should be sloping down?
Wikipedia: The decibel (dB) is a logarithmic unit of measurement that expresses the magnitude of a physical quantity, it is a dimensionless unit. 20uPa/V is 0dBspl - threshold of hearing.
This measurement is uncalibrated - unknown efficiency. Don't know what can be expected from heterodyne transducer - maybe typical bandpass. Some DSP is probably incorporated.
Cheers,
This measurement is uncalibrated - unknown efficiency. Don't know what can be expected from heterodyne transducer - maybe typical bandpass. Some DSP is probably incorporated.
Cheers,
Jzagaja:
Thank you. By DSP do you mean equalization? Because if the plot is not equalized, it would seem that not that much equalization is necessary up to 10kHz-it really "rolls off the table" after that. But that should be more than adequate for PA work.
I also gather that the "column" they talk about is horizontal rather than vertical. Sort of a sound laser from source to point.
I wonder if they have directionality charts which show how quickly the SPL goes down once you leave the area of maximum SPL.
Thank you. By DSP do you mean equalization? Because if the plot is not equalized, it would seem that not that much equalization is necessary up to 10kHz-it really "rolls off the table" after that. But that should be more than adequate for PA work.
I also gather that the "column" they talk about is horizontal rather than vertical. Sort of a sound laser from source to point.
I wonder if they have directionality charts which show how quickly the SPL goes down once you leave the area of maximum SPL.
I had only 5 minutes and laptop. Now don't have any chance of putting hands on them. Directivity is really extreme - forget about horns. Here you hear almost nothing outside the beam.
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