Sat Jun 18 02:58:14 BST 2005

Various electronic and electrical devices, recorded using a Radio Shack telephone pickup while I wandered around the flat with the laptop. Well, that's why I was wandering around - not that I wouldn't anyway. The files are in alphabetical order. When recording, I started in the kitchen and moved to the 'orange room', where the other computers and routers are kept.


File list and comments:

total 76844

-rw-r--r--  1 lex users  1659007 Jun 18 03:02 EL_OS_clock.mp3
: Portable radio clock with electroluminescent display and 'beep-beep' alarm
which becomes very irritating after a minute or so.

-rw-r--r--  1 lex users      246 Jun 18 03:00 README.txt
: Text version of this file

-rw-r--r--  1 lex users   713334 Jun 18 03:03 attraction-lcd-monitor.mp3
: 17-inch LCD monitor

-rw-r--r--  1 lex users  1522334 Jun 18 03:03 attraction.mp3
: Pentium-4/3000 PC

-rw-r--r--  1 lex users   502096 Jun 18 03:04 belinea-monitor.mp3
: Old (1998) CRT monitor - still working fine in spite of several house moves

-rw-r--r--  1 lex users  3570752 Jun 18 03:04 belkin_bt_usb.mp3
: USB Bluetooth adaptor with a very powerful output (100-metre range)

-rw-r--r--  1 lex users  4649087 Jun 18 03:05 cordless-phone.mp3
: Philips DECT cordless phone

-rw-r--r--  1 lex users  1439160 Jun 18 03:05 cranefly.mp3
: AMD K6-500 PC (webserver)
: The loud sawtooth-like sound is the CD drive motor, while the low-pitched
: whirring is the floppy drive.

-rw-r--r--  1 lex users   485795 Jun 18 03:06 earlgrey.mp3
: A nice hot cup of tea (doesn't emit much electromagnetic energy)

-rw-r--r--  1 lex users   297456 Jun 18 03:06 es_light.mp3
: Energy-saving fluorescent desk lamp - big 50Hz buzz.

-rw-r--r--  1 lex users  1425785 Jun 18 03:06 ethernet.mp3
: Supposed to be the emanations of a bit of Cat-5 cable, although all I
: picked up was interference from the laptop.

-rw-r--r--  1 lex users  1019947 Jun 18 03:06 gupi.mp3
: Mechanical toy with a faulty battery and some very powerful motors, which
: probably explains why the battery is faulty, actually.

-rw-r--r--  1 lex users  3851620 Jun 18 03:07 ipaq_hx4700.mp3
: Hewlett-Packard hx4700 PDA (backlit display, wi-fi, Bluetooth)

-rw-r--r--  1 lex users  2130882 Jun 18 03:07 kettle.mp3
: TEAM kitchen kettle

-rw-r--r--  1 lex users   307494 Jun 18 03:08 mercury_switch.mp3
: Not a mercury tilt switch, but a Kobian/Mercury Ethernet switch (5-port)

-rw-r--r--  1 lex users   470331 Jun 18 03:08 microwave.mp3
: Samsung microwave oven (800W)

-rw-r--r--  1 lex users  4523028 Jun 18 03:08 mos_digital_radio.mp3
: Ministry Of Sound portable digital radio.  I was able to record good-
: quality audio from the earphones.  The radio emitted a lot of noise
: from its EL display.  Radio stations featured: BBC Radio Five Live,
: Acen (Welsh), BBC Asian Network, DNN, various other local stations.
: Recorded at 02:26.

-rw-r--r--  1 lex users  1503108 Jun 18 03:08 nokia_7650.mp3
: Nokia 7650 GSM mobile phone / cellphone.  The low-frequency noise at the
: start of the sample is caused by the laptop itself.

-rw-r--r--  1 lex users   694775 Jun 18 03:09 pclink-switch.mp3
: 5-port Ethernet switch (emits a lot of clock noise)

-rw-r--r--  1 lex users  4198945 Jun 18 03:09 pickup.mp3
: Telephone pickup test.  I am not sure what I was recording here; at a
: guess, I'd say it was probably the laptop (Fujitsu-Siemens Amilo Pro V1000).

-rw-r--r--  1 lex users   568133 Jun 18 03:10 plasma-clock.mp3
: Quartz wall clock with blue plasma dial (plasma emits much crackly noise)

-rw-r--r--  1 lex users  1157456 Jun 18 03:10 plasma-globe.mp3
: One of those lightning-like plasma lights

-rw-r--r--  1 lex users   723776 Jun 18 03:11 playstation2.mp3
: Sony Playstation 2, of the original 'black and chunky' type.  Has a large
: PSU so there's a lot of 50 Hertz hum.  The 'sweeping' low-pitched noise is
: the DVD drive.

-rw-r--r--  1 lex users  2097446 Jun 18 03:11 printer.mp3
: Hewlett-Packard Deskjet 870Cxi.  When I recorded this, it was busy doing
: its demo printout - you can hear the print head shuttling around.  The
: middle-pitched notes are from the stepper motor that powers the platen.

-rw-r--r--  1 lex users 10235947 Jun 18 03:11 psp.mp3
: Sony PSP1000 ('Playstation Portable'), originating from Japan.  Much
: electronic noise here, and I was startled that the UMD drive causes a
: very powerful magnetic pulse (you can hear this after I started playing
: "Everybody's Changing".  These brief clips of music are from Keane's
: 'Hopes & Fears' album, copied to the Memory Stick PRO Duo as mp3s.
: The UMD game featured is 'Lumines'.

-rw-r--r--  1 lex users  2715607 Jun 18 03:12 roberts-radio.mp3
: Roberts portable digital radio: there's a lot of 50Hz buzz from the mains
: transformer here, and audio from local radio stations.

-rw-r--r--  1 lex users  1737165 Jun 18 03:12 sleep-machine.mp3
: Radio Shack 'Sleep Machine'.  This is a digital clock which outputs several
: sound clips: ocean, wind, train, 'night'.  The unit has a fault where it
: resets when the sound stops playing (possibly needs a capacitor).

-rw-r--r--  1 lex users  2789168 Jun 18 03:12 smc-2835w-wifi.mp3
: PCMCIA/Cardbus wireless adaptor

-rw-r--r--  1 lex users  1057145 Jun 18 03:13 smc7804wbra-router
: Wireless Ethernet ADSL router
: Buzzes a lot.  Crashes as well, although I didn't record that.

-rw-r--r--  1 lex users   820162 Jun 18 03:13 sparcserver.mp3
: This ancient computer (1990) has many noisy fans and an efficient PSU.
: I picked up lots of clock noise from the system card.  At the end of the
: sample, I switch the computer off.

-rw-r--r--  1 lex users  2061919 Jun 18 03:13 spc_c500.mp3
: SPV C500 cellphone/mobile: large backlit display, Bluetooth.  In this
: demonstration I call my home phone (the DTMF tones can be heard).

-rw-r--r--  1 lex users  1918723 Jun 18 03:14 tandy102.mp3
: Radio Shack Model 100 / Tandy 102 portable computer.  This computer is 20
: years old and emits almost no RF noise.  The only noises you can hear are
: from the laptop.  The clicking sounds and high-pitched tone are from the
: built-in 300 baud modem.

-rw-r--r--  1 lex users   340763 Jun 18 03:14 toaster.mp3
: This being an appliance with a heating element, much 50Hz hum is picked up.

-rw-r--r--  1 lex users   507529 Jun 18 03:14 torch.mp3
: Shake... shake... shake.. click, click (18s).  This torch requires no
: batteries and is powered by shaking it: a magnet moves up and down between
: two coils (or is it a coil moving between magnets?), causing a capacitor to
: be charged.  The capacitor slowly discharges when the light is switched on
: (white LED).

-rw-r--r--  1 lex users  1287441 Jun 18 03:14 travel_clock.mp3
: A cheap portable travel clock with a quartz-controlled solenoid mechanism
: and a 'bip-bip-bip-bip' alarm.

-rw-r--r--  1 lex users   600316 Jun 18 03:15 winter-benq-monitor.mp3
: This is a TFT monitor.  As you'd expect with a TFT, the pickup records
: the drive clock of the ... of the.. you know what I'm trying to say, don't
: you? ... cos' I'm buggered if I do.

-rw-r--r--  1 lex users  3519922 Jun 18 03:15 winter-mobo.mp3
: AMD Athlon XP/1700 PC.  Lots of noise coming from the NVIDIA graphics
: card (the fan speed can be heard varying at around 20s).  The bursts of
: periodic noise are emitted from the system bus - the computer is processing
: Marsenne Prime numbers.  At 1m55s, the medium-pitched sine tone is from the
: EL display of the 'Cooler Master' hard drive fan controller.  This repeats
: at 02:50, when I change the speed of the HD fan.

-rw-r--r--  1 lex users  1385661 Jun 18 03:15 winter.mp3
: AMD Athlon XP/1700
: The outside of the case: PSU fan, Cooler Master fan controller.  The
: 'beep-beep' is the alarm reminding me that the CPU fan is not connected to
: it (it's plugged into the motherboard so I can monitor the speed with the
: system software).

-rw-r--r--  1 lex users  2152616 Jun 18 03:15 wrt54g.mp3
: Linksys WRT54G wireless Ethernet router

-rw-r--r--  1 lex users  5750827 Jun 18 03:16 zaurus.mp3
: Sharp Zaurus SL-C860 PDA

Return to the site index page