Sound quality improvement on an LG

A chap mentioned to me this afternoon that he had been troubled by the
booming sound from his LG telly. The set was on a wooden table in a
recess. If he had the sound loud enough to hear speech clearly there was
an annoying bass 'honk', probably caused by the set's enclosed
surroundings. Reducing the bass made the sound too tinny. The two
speakers are on the thin bottom surface of the set facing downwards, so
he had made two 'flat V' shaped reflectors from aluminium sheet. One arm
of the V was fixed to the back of the set with "very short" self
tappers, so the other arm formed a reflecting surface below the set,
directing the sound forwards. This increased the audibility of speech so
much that he could turn the volume down, and the booming was much
diminished.

Bill

On Wed, 16 Mar 2011 23:31:02 +0000, Bill Wright
wrote:

A chap mentioned to me this afternoon that he had been troubled by the
booming sound from his LG telly. The set was on a wooden table in a
recess. If he had the sound loud enough to hear speech clearly there was
an annoying bass 'honk', probably caused by the set's enclosed
surroundings. Reducing the bass made the sound too tinny. The two
speakers are on the thin bottom surface of the set facing downwards, so
he had made two 'flat V' shaped reflectors from aluminium sheet. One arm
of the V was fixed to the back of the set with "very short" self
tappers, so the other arm formed a reflecting surface below the set,
directing the sound forwards. This increased the audibility of speech so
much that he could turn the volume down, and the booming was much
diminished.

Cunning.


--
Peter Duncanson
(in uk.tech.digital-tv)

Peter Duncanson wrote:
On Wed, 16 Mar 2011 23:31:02 +0000, Bill Wright
wrote:

A chap mentioned to me this afternoon that he had been troubled by the
booming sound from his LG telly. The set was on a wooden table in a
recess. If he had the sound loud enough to hear speech clearly there was
an annoying bass 'honk', probably caused by the set's enclosed
surroundings. Reducing the bass made the sound too tinny. The two
speakers are on the thin bottom surface of the set facing downwards, so
he had made two 'flat V' shaped reflectors from aluminium sheet. One arm
of the V was fixed to the back of the set with "very short" self
tappers, so the other arm formed a reflecting surface below the set,
directing the sound forwards. This increased the audibility of speech so
much that he could turn the volume down, and the booming was much
diminished.

Cunning.

Yes, well since I posted that I've remembered that many many years ago I
fixed an aerial for a deaf lady (who lived in the cottages around the
courtyard at Hooton Pagnell if anyone knows the area) and she had a
telly with a sideways facing speaker, which faced the curtains, and she
couldn't hear a bloody thing. I propped up a hard backed book to reflect
the sound forwards and it made a real difference.

The craze in the 60s for making loudspeakers from concrete pipes meant
that the driver was facing the ceiling, so we used to fit a 45deg
reflector.

Ohh, it's all coming back to me!

Another acoustic phenomonomomon. For years we wondered why, if anyone
walked across the (loose) slabs that were outside our house the noise
could be heard anywhere in the building. When we dug up the area where
the slabs were to build a concrete drive we found a concrete raft below
the slabs and below that a void, which extended to the side of the house
(there's one storey partially underground). The void was allowing the
sound to transmit to the wall of the house.

Bill

"Bill Wright" wrote in message
...
A chap mentioned to me this afternoon that he had been troubled by the
booming sound from his LG telly. The set was on a wooden table in a recess.
If he had the sound loud enough to hear speech clearly there was an
annoying bass 'honk', probably caused by the set's enclosed surroundings.
Reducing the bass made the sound too tinny. The two speakers are on the
thin bottom surface of the set facing downwards, so he had made two 'flat
V' shaped reflectors from aluminium sheet. One arm of the V was fixed to
the back of the set with "very short" self tappers, so the other arm formed
a reflecting surface below the set, directing the sound forwards. This
increased the audibility of speech so much that he could turn the volume
down, and the booming was much diminished.

Bill

allilujah.............no, I'll get me coat.

So what a stupid place to put speakers.

I noted one set a few weeks ago where something inside rattled on certain
notes. It took me back to the old valve tellies of the 70s which sometimes
did this due to the amount of resonant bits and pieces inside them.

Brian

--
Brian Gaff -
Note:- In order to reduce spam, any email without 'Brian Gaff'
in the display name may be lost.
Blind user, so no pictures please!
"Bill Wright" wrote in message
...
A chap mentioned to me this afternoon that he had been troubled by the
booming sound from his LG telly. The set was on a wooden table in a recess.
If he had the sound loud enough to hear speech clearly there was an
annoying bass 'honk', probably caused by the set's enclosed surroundings.
Reducing the bass made the sound too tinny. The two speakers are on the
thin bottom surface of the set facing downwards, so he had made two 'flat
V' shaped reflectors from aluminium sheet. One arm of the V was fixed to
the back of the set with "very short" self tappers, so the other arm formed
a reflecting surface below the set, directing the sound forwards. This
increased the audibility of speech so much that he could turn the volume
down, and the booming was much diminished.

Bill

On 17/03/2011 02:22, Bill Wright wrote:
Peter Duncanson wrote:
On Wed, 16 Mar 2011 23:31:02 +0000, Bill Wright
wrote:

A chap mentioned to me this afternoon that he had been troubled by
the booming sound from his LG telly. The set was on a wooden table
in a recess. If he had the sound loud enough to hear speech clearly
there was an annoying bass 'honk', probably caused by the set's
enclosed surroundings. Reducing the bass made the sound too tinny.
The two speakers are on the thin bottom surface of the set facing
downwards, so he had made two 'flat V' shaped reflectors from
aluminium sheet. One arm of the V was fixed to the back of the set
with "very short" self tappers, so the other arm formed a reflecting
surface below the set, directing the sound forwards. This increased
the audibility of speech so much that he could turn the volume down,
and the booming was much diminished.

Cunning.

Yes, well since I posted that I've remembered that many many years ago
I fixed an aerial for a deaf lady (who lived in the cottages around
the courtyard at Hooton Pagnell if anyone knows the area) and she had
a telly with a sideways facing speaker, which faced the curtains, and
she couldn't hear a bloody thing. I propped up a hard backed book to
reflect the sound forwards and it made a real difference.

The craze in the 60s for making loudspeakers from concrete pipes meant
that the driver was facing the ceiling, so we used to fit a 45deg
reflector.

A la A R Briggs of wharfedale fame ? . If I remember rightly the
reflector was an inverted metal cone but it's a long time ago.
Briggs used to tour the country giving lectures and blind comparisons
of various speaker systems. I went to one in Aberystwyth Uni in the
middle 60s I think? Very informative it was too. I purchased his book
but unfortunately lost it somewhere.
Don

Ohh, it's all coming back to me!

Another acoustic phenomonomomon. For years we wondered why, if anyone
walked across the (loose) slabs that were outside our house the noise
could be heard anywhere in the building. When we dug up the area where
the slabs were to build a concrete drive we found a concrete raft
below the slabs and below that a void, which extended to the side of
the house (there's one storey partially underground). The void was
allowing the sound to transmit to the wall of the house.

Bill

In message , Bill Wright
writes
A chap mentioned to me this afternoon that he had been troubled by the
booming sound from his LG telly. The set was on a wooden table in a
recess. If he had the sound loud enough to hear speech clearly there
was an annoying bass 'honk', probably caused by the set's enclosed
surroundings. Reducing the bass made the sound too tinny. The two
speakers are on the thin bottom surface of the set facing downwards, so
he had made two 'flat V' shaped reflectors from aluminium sheet. One
arm of the V was fixed to the back of the set with "very short" self
tappers, so the other arm formed a reflecting surface below the set,
directing the sound forwards. This increased the audibility of speech
so much that he could turn the volume down, and the booming was much diminished.

Bill

When I had a 9200T, it sat on a glass shelf and the hard drive used to
hum.

I put a strip of polystyrene under each end and quietened it
considerably.
--
Ian

Donwill wrote:

A la A R Briggs of wharfedale fame ?
Yes one version used an 8" coaxial Wharfedale speaker, another the 10" I
think.

.. If I remember rightly the
reflector was an inverted metal cone

Yes, but I just used a flat plate, a section of a double bend sign.

Bill

In article , Ian wrote:
When I had a 9200T, it sat on a glass shelf and the hard drive used to
hum.

I put a strip of polystyrene under each end and quietened it
considerably.

I have a Cambridge Audio hi-fi CD player which hums even when it's
switched off! Apparently the power switch is downwind of the mains
transformer. If it weren't made by such a well respected audio equipment
manufacturer I might be tempted to criticise this as bad engineering.
Maybe I'll dismantle it and give the laminations a squeeze in a vice one
day, but in the meantime, the temporary (possibly becoming permanent)
workaround is to unplug it and play CDs on something else instead.

Rod.
--
Virtual Access V6.3 free usenet/email software from
http://sourceforge.net/projects/virtual-access/

On 17/03/2011 11:27, Roderick Stewart wrote:
In , Ian wrote:

When I had a 9200T, it sat on a glass shelf and the hard drive used to
hum.

I put a strip of polystyrene under each end and quietened it
considerably.

I have a Cambridge Audio hi-fi CD player which hums even when it's
switched off! Apparently the power switch is downwind of the mains
transformer. If it weren't made by such a well respected audio equipment
manufacturer I might be tempted to criticise this as bad engineering.
Maybe I'll dismantle it and give the laminations a squeeze in a vice one
day, but in the meantime, the temporary (possibly becoming permanent)
workaround is to unplug it and play CDs on something else instead.

Rod.

Damn it, and I was thinking of buying a Cambridge Topaz CD10 premium CD
player in the hope that it would perform better than the old Sony which
has developed silly faults.
Don