Thread: 800 Series HB

Aw man, I got a 797 too, and ain't real happy with what all's went on,
and I'm watching Lowrance's progress too -

but 797 is still a pretty decent machine, and at least we can call H'bird
and talk to somebody, get a little affection with our reaming :D
Still not hearin much outta Lowrance's customer service.
That one poor woman that seemed to be the only one working there,
I heard on another site that they were forcing her to take her vacation
time off against her wishes even though her inbox is overflowing.
What I heard, anyway.

Originally Posted by rnvinc

What does this mean in simple layman's terms.....as far as what the user's end results would be...??

There are no enforceable standards governing what the manufacturers claim on the side of a box. It a lot of BS talking points to add confusion. Big numbers look good, but, in some cases can hinder the performance of a unit. you know, kinda like putting a sprint car on a go cart track.

db ( in some cases) is a logarithmic measurement with respect to a known reference. In acoustics , db is is usually in Pascals. I don't remember much of this chit.


Hereis the acoustic power wheel.

Sound pressure level, acoustics, particle velocity, acoustic impedance, sound intensity characteristic impedance dB SPL calculations ohm's law acousticequivalent pascal audio calculations sound units - sengpielaudio

Originally Posted by Humminbird_Greg

Cane Pole is right (as usual). The power rating is a measure of the amount of sound energy and not a straight DC or AC wattage reading from the input power and current.

Also always be wary when comparing wattage as some will spec only peak-to-peak wattage ratings while others spec RMS wattage (P-P should be 8x the RMS wattage value).

I have no idea where anyone came up with that 8X value.:rolleyes::rolleyes:

New math???????

This is the way I lernt sound and it is still being taught this way. Must be Humminbird math.

I sure don't see any 8X in these basic formulas.:rolleyes:

Introduction to Decibels: Science of Sound in the Sea

I agree with you Jwhite, the 797 does the job on a smaller scale, and will certainly show you what's under the water. It just seems like HB takes advantage a little bit. Bet that'll change some since they aren't the only guys on the block with SI.

Still waiting on the 8X answer????????????

8X? Still waiting.

Cane Pole,
I’m not sure what formula was used for this (it’s been many years since I went through electronics school) but it’s the same 8x relationship that other manufacturers use in their advertising as well.

Originally Posted by Humminbird_Greg

Cane Pole,
I’m not sure what formula was used for this (it’s been many years since I went through electronics school) but it’s the same 8x relationship that other manufacturers use in their advertising as well.

A politically correct answer, but I prefer facts.

I heard something similar on the news the other day: Bush did it too. :rolleyes:

Nothing jives on any of the acoustic power wheels that relates to the 8x phenomenon.