The Most Suitable Waveform for Cancellation

[Bret Cahill]

Some folks like to cancel noise but using a microphone on a headphone
not only is less than 70% efficient, it cancels a lot of stuff you
sometimes need to hear.

It would be much better if _ you_ were creating the noise.

The waveform, speaker and headphones would all be designed together
and optimized so that 99% of the "noise" could be cancelled.

No one else could hear anything but you could hear a pin drop.

The wage form needs to be a compromise between a square wave and the
easiest to cancel waveform.

The system would determine the beat and major frequencies of the music
next door or the next lane and join in with a one or two measure delay
or echo except 20 decibels louder and at 5% lower slowly fluctuating
major frequencies.

The speaker would necessarily present a large target and therefore
should be designed out of sheet steel so that it can be cheaply and
quickly replaced when it acquires too many holes.

This could be a real money maker for Bose or who ever designs and
patents it first.


Bret Cahill

 

[Bret Cahill]

Some folks like to cancel noise but using a microphone on a headphone
not only is less than 70% efficient, it cancels a lot of stuff you
sometimes need to hear.

It would be much better if _ you_ were creating the noise.

The waveform, speaker and headphones would all be designed together
and optimized so that 99% of the "noise" could be cancelled.

No one else could hear anything but you could hear a pin drop.

The wage form needs to be a compromise between a square wave and the
easiest to cancel waveform.

The system would determine the beat and major frequencies of the music
next door or the next lane and join in with a one or two measure delay
or echo except 20 decibels louder and at 5% lower slowly fluctuating
major frequencies.

The speaker would necessarily present a large target and therefore
should be designed out of sheet steel so that it can be cheaply and
quickly replaced when it acquires too many holes.

This could be a real money maker for Bose or who ever designs and
patents it first.

A decade ago when the unemployment rate in Tampa, FL was below 2% and
muffler shops were giving out free and correct diagnoses because they
already had too many customers, I made the mistake of being a little
too much in a hurry at a popular Tai restaurant in Hyde Park.

They prepared several perfectly wholesome take outs but did something
with the spices or sauces that rendered it absolutely inedible. If
you weren't polite at that restaurant you didn't come back.

We need the audio equivalent of that take out food.

Just as the most charming people also know how to be the most
obnoxious a few musicians or music theory profs could really do this
right.


Bret Cahill

 

[Bret Cahill]

It would be surprising if the military didn't have some
electromagnetic version of this, microwave for radar jamming or maybe
even optical:

Some folks like to cancel noise but using a microphone on a headphone
not only is less than 70% efficient, it cancels a lot of stuff you
sometimes need to hear.

It would be much better if _ you_ were creating the noise.

The waveform, speaker and headphones would all be designed together
and optimized so that 99% of the "noise" could be cancelled.

No one else could hear anything but you could hear a pin drop.

The wage form needs to be a compromise between a square wave and the
easiest to cancel waveform.

The system would determine the beat and major frequencies of the music
next door or the next lane and join in with a one or two measure delay
or echo except 20 decibels louder and at 5% lower slowly fluctuating
major frequencies.

The speaker would necessarily present a large target and therefore
should be designed out of sheet steel so that it can be cheaply and
quickly replaced when it acquires too many holes.

This could be a real money maker for Bose or who ever designs and
patents it first.