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use headphones and I've tried putting
blankets on the wall for soundproofing, but I still get complaints.
That leaves two possible options.
How about an electronic solution?
There is no practical noise cancelling technology on that scale.
Building an anechoic chamber would
be very expensive. Playing guitar in a
vacuum would not allow you to hear
yourself (since sound does not travel
in a vacuum) and would suffocate you.
1 CLS
192 REM:
**********************************************************************************************************
193 REM: (1) SORT IN ASCENDING ORDER: ALL ACTUAL NUMBERS DRAWN (and the corresponding 'dates drawn')
194 REM: (2) SORT IN ASCENDING ORDER: DATES DRAWN (and the corresponding 'numbers drawn')
195 REM:
**********************************************************************************************************
196 REM: C$ = RATIO OF EVEN/ODD NUMBERS CONTAINED
197 REM: B$ = ACTUAL NUMBER DRAWN
198 REM: N$ = DATE DRAWN
199 REM: ******************************************************************
200 DIM N$(200), B$(200), C$(200)
201 REM: *******************************
210 REM - READ number of records
211 REM: *******************************
220 READ K
221 REM: **********************************
230 REM - READ records into ARRAYS
231 REM: **********************************
240 FOR I = 1 TO K
250 READ N$(I), B$(I), C$(I)
255 NEXT I
260 PRINT "**************************************************************************"
261 PRINT "SORT based on ALL ACTUAL NUMBERS DRAWN by ENTERing (1) OR "
262 PRINT "SORT based on DATES DRAWN by ENTERing (2) ";
263 INPUT C
264 IF C <> 1 AND C <> 2 THEN PRINT "---- < OOPS!. WRONG CHOICE ENTERED!. TRY AGAIN!. ENTER either (1) or (2)!. >
----": GOTO 260
265 IF C = 1 THEN 270
266 IF C = 2 THEN 345
267 REM: **********************************************************************************
268 REM : SORT based on ALL ACTUAL NUMBERS DRAWN by ENTERing (1)
269 REM: **********************************************************************************
270 FOR I = 1 TO K
280 FOR J = 1 TO K - 1
290 IF B$(J) > B$(J + 1) THEN SWAP B$(J), B$(J + 1)
300 NEXT J
310 NEXT I
311 D$ = N$(I) + " , " +B$(I) + ", " + C$(I)
320 REM - sorted in ascending order: ACTUAL NUMBERS DRAWN (with corresponding 'dates drawn') to be printed
330 FOR I = 1 TO K
335 PRINT I, D$
339 NEXT I
340 GOTO 390
342 REM: **********************************************************
343 REM: SORT based on DATES DRAWN by entering (2)
344 REM: **********************************************************
345 FOR I = 1 TO K
346 FOR J = 1 TO K - 1
347 IF N$(J) > N$(J + 1) THEN SWAP N$(J), N$(J + 1)
348 NEXT J
349 NEXT I
350 REM - sorted in ascending order: DATES DRAWN (with corresponding 'numbers drawn') to be printed
355 FOR I = 1 TO K
360 PRINT I, N$(I), B$(I), C$(I)
365 NEXT I
390 DATA 200
10001 DATA "10/22/1994", "10,16,20,28,39,40", "(5Even/1Odd)"
10002 DATA "12/10/1994", "21,23,35,37,39,48", "(1Even/5Odd)"
10003 DATA "01/07/1995", "24,31,33,35,40,44", "(3Even/3Odd)"
10004 DATA "02/04/1995", "11,20,21,24,29,42", "(3Even/3Odd)"
10005 DATA "02/11/1995", "14,17,25,30,31,34", "(3Even/3Odd)"
10006 DATA "05/06/1995", "15,18,23,24,36,48", "(4Even/2Odd)"
10007 DATA "05/20/1995", "11,27,34,35,37,45", "(2Even/4Odd)"
..........................................................................................................
10196 DATA "06/25/2003", "10,16,31,35,38,43", "(3Even/3Odd)"
10197 DATA "06/28/2003", "18,19,26,34,46,47", "(4Even/2Odd)"
10198 DATA "07/02/2003", "20,25,26,36,37,47", "(3Even/3Odd)"
10199 DATA "07/16/2003", "10,16,22,24,26,37", "(5Even/1Odd)"
10200 DATA "08/23/2003", "17,24,26,28,41,44", "(4Even/2Odd)"
40000000 END
Relax your ban on headphones
and use a product such as the $40
Amplug — the headphone guitar amp
that lets you enjoy serious guitar sound,
fast. See www.voxamps.com/amplug
or possibly go with the low tech solution of playing under a wool blanket.
More than 40 years ago, we
wanted to record short skits for radio
brodcast in our college dorm room.
Our input was not as loud as an
accoustic guitar, and we were close
mic-ed for voice and sound effects.
We had such good sound isolation,
that it effectively blocked the external
noise of nearby stereos, running feet,
shouting, and anti Vietnam War riots
outside the building. Many people
wondered where we found such a
quiet place to record! This probably
will not work for amplified electric
guitars. You could use a self-standing
tent, covering it with heavy blankets
down to the floor. The level outside the
tent will be dramatically attenuated.
Barry Cole
Lacey, WA
[#10143 - October 2014]
Carbon or Metal?
Is there a rule of thumb for when
it is better to use carbon film resistors
over metal film resistors?
As a "rule of thumb," I recommend: Choose carbon film resistors
when low cost (at high quantity) is the
main consideration. Use metal
film resistors when low noise/low
temperature coefficient, and/or
greater precision are important.
Listing 1
All types of resistors generate
thermal noise — also called "Johnson
noise" — which increases as resistance
and temperature increase. This comes
directly from the laws of physics
which, as Engineer Scotty famously
said on Star Trek, "you cannae
change." However, current flowing
through a resistor causes additional
noise — including "shot noise" — and
November 2014 79
