ARCHIVED FORUM -- March 2012 to February 2022READ ONLY FORUM
This is the second Archived Forum which was active between 1st March 2012 and 23rd February 2022
It's been a little while since we've had a competition, so here we go!
B&O gave me a full-colour, high quality brochure for the BeoLab 90 - and I got the Bang & Olufsen Tonmeister Geoff Martin, the man behind the sound of the BeoLab 90, to sign it for one lucky winner!!
If you look carefully you can see the pen in his hand and the brochure on his lap. He gave me the brochure back but I didn't manage to snaffle his pen, so it's just the brochure you see in the image which could be winging its way to you soon!
So - here’s the question from the Tonmeister himself.
“What is in my hand? I know it’s a half pint glass, but what specific use did I have for it at Bang & Olufsen..?”
Post your answers - and if nobody gets near I’ll drop a clue once a day until someone does. For the record, it's got nothing to do with the BeoLab 90 for once!!
Good Luck!!
Listening to the neighbours.
Graham
Turning your finger on the glass rim will bring out a certain tone, Der Tonmeister used it for comparation
Collecting Vintage B&O is not a hobby, its a lifestyle.
He needed 12 of these glasses to convince the CEO that the Beolab 90s are going to be build. Now they are empty
Geoff, you exposed this glass to a certain frequency of a pair of BeoLab 90s. Thus it gave a clear sound. If there had been a difference between the two speakers, this resounding would have been a little bit "dirty" and at least one speaker would have needed a little bit of tweaking. Edit: I saw too late that it has nothing to do with BeoLab 90.
I don't think you tried to blast a glass by a resonating frequency because the glass is either too thick or you cared more for your ears than for special effects
Vibration and shattering of the wine glass in front of the BL90 when the tone matches the glass resonance.
Was going to go with the shatter of the glass, but as others have guessed that, I will go with the curves of the glass were used as a base for the curves of the speaker
Okay. Todays clue is..
'It's about the sound'
To demonstrate resonant frequency (eg as the ringing of the glass after it is tapped)?
Beovision 7 40 mk 5 ,beovision 6x3, beosound 3000, beogram 3300 , 2 x lc2, 2 x beocom 1401, beocom 6000 x 2, 5 x beo4,
, 4 x beolab 4's, form 2, h2, a2,a1 and a beolab 2 😀😀
The sound is a resonance phenomenon.
The glass produce a pure tone at 442 Hertz resonance frequency - for example.
If the speaker correctly reproduces the 442 Hz resonant frequency, the glass is broken by the pressure wave. So it is 121,4 dB.
Geoff Martins use a pint glass to control resonance frequencies of the speaker.
Did Geoff fill the glass with a fluid then use it to see how much the lower frequencies made the fluid move (I am sure there is a technical term for that!) to get an idea of the bass thumping out?
So - what is todays clue?
MM
There is a tv - and there is a BV
Todays clue is...
"You could hear a pin drop...."
Lee
Using the glass like an ear horn to make the inaudible audible?
So WHAT is the glas for???
Todays clue :
"Enter the 5's"
He wanted to give a toast?
9 LEE: Todays clue : "Enter the 5's"
Ever more cryptic clues
Okay, so I can't think what "the 5's" might refer to other than the BL5's, but the development of these was before Geoff's time at B&O...
so, thinking more laterally, something which enters the BL5 mechanically is it's microphone, so perhaps this what this clue relates to?
The other obvious place microphones are used in within the cube (where you could also hear a pin drop), so was the glass used to increase measurement sensitivity to sounds in a particular frequency range there?
Martin.
Lee:Did they record and reproduce the sound...
First part is correct. That's your clue for today
9 LEE: Lee:Did they record and reproduce the sound... First part is correct. That's your clue for today
The speakers have audible feedback on some setting, and that's the "ding" of that glass?
--mika
tournedos: The speakers have audible feedback on some setting, and that's the "ding" of that glass?
Read the clues and you'll have the answer.. You're almost there!
They used the ping of the glass to adjust 5 drivers to the same frequency
If the glas stays for 5 minutes on top of the speakers at a volume of 90, they have passed the test.
Is the sound that is produced when a pin code is entered a recording of the glass being struck?
9 LEE: “What is in my hand? I know it’s a half pint glass, but what specific use did I have for it at Bang & Olufsen..?”
The 'Ping' of the glass is recorded at very high quality and is then played back via the BL5.
If the reproduced sound makes the glass resonate then that proves the quality of the speaker reproduction.
vikinger: The 'Ping' of the glass is recorded at very high quality and is then played back via the BL5. If the reproduced sound makes the glass resonate then that proves the quality of the speaker reproduction. Graham
I should have said that the ping is played back as a sustained note and the glass resonance can be checked at different positions around the speaker.
vikinger: vikinger: The 'Ping' of the glass is recorded at very high quality and is then played back via the BL5. If the reproduced sound makes the glass resonate then that proves the quality of the speaker reproduction. Graham I should have said that the ping is played back as a sustained note and the glass resonance can be checked at different positions around the speaker. Graham
Confirming the acoustic lens sound distribution.
riverstyx: Is the sound that is produced when a pin code is entered a recording of the glass being struck?
WINNER !!!
Yes, Geoff told me he held that exact glass in front of a microphone, flicked the edge and recorded the sound, then took it (from memory) a couple of octaves lower, synthesised it using his magic powers, then made it the PIN Code entry confirmation for the BeoLab 5.
PM me your address and I'll get the signed BeoLab 90 brochure to you!
Well done to all who entered
9 LEE: riverstyx: Is the sound that is produced when a pin code is entered a recording of the glass being struck? WINNER !!! Yes, Geoff told me he held that exact glass in front of a microphone, flicked the edge and recorded the sound, then took it (from memory) a couple of octaves lower, synthesised it using his magic powers, then made it the PIN Code entry confirmation for the BeoLab 5. PM me your address and I'll get the signed BeoLab 90 brochure to you! Well done to all who entered Lee
Woohoo!
Thank you so much Lee, and Geoff, and everyone else who entered.
Well done!
Congrats.