Indeed, the IF bandwidth of an FM receiver is particularly critical in
determining performance, particularly when carrying a stereo subcarrier. But
it's perfectly possible to include information on the shape, width and phase
performance of the IF passband in the specs. We don't need to get into
"golden ear" stuff.
FWIW Yamaha did once do FM tuners with 'active nulling' of the 19k pilot
tone so their filters could be more relaxed about HF roll-away.
Indeed, as does limiting the transmission bandwidth.
Reviews and maker specs tend to tell you something like the 'mono 300Hz'
distortion and not mention other types of modulation. Hardly surprising
behaviour on their part - once you've measured and/or analysed other
Please use the address on the audiomisc page if you wish to email me.
I'm talking about the ultrasonic teen repellants. For a gadget that
just generates a high-pitched sound they're astronomically expensive,
It must surely be possible to knock something up with bits from
Maplins that will do the same thing for a tenner?
If you want to feel your age:
Sounds like a good way to get a noise abatement order imposed on you.
Just because you can't hear it doesn't stop it being a nuisance if someone
Its not just teenagers that can hear it but babies and young children as
well as dogs, cats, maybe bats and other protected species.
On Tue, 03 Aug 2010 06:10:26 -0700, Anita Palley wrote:
'Green' solution: Get a small cardboard box with a lid. Install a fine
metal mesh under the lid. Fill the box with mosquitos. Open lid when
undesirable youths are nearby.
Decorating the box and use of sticky-backed plastic are optional.
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