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Audio Forensics Hardware Products
| | Enhanced
Audio is pleased to present these high quality technical audio
analysis hardware tools. These high quality units can be a
tremendous aid in your Forensics endeavors. Just click on a
unit to see more. |
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MICRO-CASSETTE
PLAYBACK/TRANSCRIBER UNIT
STANDARD
CASSETTE PLAYBACK/TRANSCRIBER UNIT
UNIVERSAL
DVD & CD PLAYER/TRANSCRIBER UNIT
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New
JBR Products
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MICRO-CASSETTE PLAYBACK/TRANSCRIBER UNIT
Playback - The unit was specifically designed to
"safely" and "accurately" play all known ¼ track stereo and
½-track monaural micro-cassette recordings.
Transcription - In addition, the unit has a foot pedal
to control the Play, Stop, and Backspace; a variable speed control and multiple
headphone outputs to aid in efficiently and accurately transcribing
hard-to-understand covert recordings.
Copying/Duplication - Adding a standard cassette
dual-deck recorder and the optional duplication control unit, creates a
professional quality micro-cassette-to-standard cassette duplicator. Adding a
CD-Recorder in addition to or in place of the cassette recorder creates a
micro-cassette-to-CD-R duplicator.
Special Features - The JBR Micro-cassette playback unit
has two playback heads. The right head is located in the standard position. The
left head is located 3/4 of an inch before the standard head location.
Therefore, this head plays approximately 3/4 inch of virgin tape, then the
original record head start transient, followed by the original erase head start
transient and the exact point where the audio starts being recorded on the tape.
This set of data is crucial in determining if a tape recording is authentic or
had been changed or altered. No other known micro-cassette playback unit can
recover this set of data.
Specs:
| Tape Format: |
4-track stereo micro-cassette. |
| Number of Channels: |
Standard: Three compensated channels
(Side A 1/4-track stereo plus Side B right channel
backwards) |
|
Optional: Four compensated &
four uncompensated channels (Side A 1/4-track stereo plus
Side B 1/4-track stereo backwards). |
| Playback Capability: |
Plays all micro-cassettes (1/4-track stereo
and ½-track monaural). |
| Variable Speed: |
 | Continuously variable (not discrete
digital steps) from 0.63 cm/sec to over 7.2 cm/sec.
| Three digit LED speed display to 1/100
cm/sec. |
|
|
| Number of Heads: |
| Two 1/4-track stereo play heads.
| One head is located to play
approximately 3/4" of virgin tape, the record head
start transient, then the erase head transient and
permits the measurement of the "warm-up" time
of the electronics of the recorder used to make this
recording.
| Head azimuth is adjustable by operator.
| Custom heads are available (see
accessories). |
| | |
|
| Number & type of
Motors: |
| Three direct drive motors. (No belts,
gears, or pulleys to wear or generate vibration and
noise). |
|
| Cross talk: |
| -60 dB (between left and right
channels, 1 kHz @ -10 dB). |
|
| Speed Change BOT to EOT: |
| Less than 1/2% (less than 15 Hz change
in the frequency of a 3 kHz tone from BOT to EOT @ 2.4
cm/sec). |
|
| Signal-to-Noise: |
| Better than 62 dBA (Referred to 250 nW/m). |
|
| Distortion: |
| Less than 1.5% (312 Hz @ 0 dB 2nd, 3rd
and 4th harmonics). |
|
| Tape Drag Display: |
| "High" and "Normal"
LED display. Provides an alert that the tape being
played is binding inside the micro-cassette housing or
sticking to itself from wrap-to-wrap. |
|
Audio Outputs:
Front of Unit: |
| Four fully isolated, unbalanced stereo
line/headphone outputs on front of unit with limiter for
hearing protection. 1/8" stereo mini-phone jacks
with switchable 0, +6 or +12 dB gain to improve
listener's ability to hear quiet passages.
| One headphone output on front of unit.
1/4" stereo phone jack with left, right, and stereo
selector switch and volume and tone controls. |
|
|
| Rear of Unit: |
| 3-Channel Unit: 3 unbalanced RCA phono
jacks on rear of Unit. 0 dB = 0.775V.
| 4-Channel Unit: 8 unbalanced RCA phono
jacks on rear of Unit. 0 dB - 0.775V. |
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|
| Audio Level Bar graph: |
| Stereo -60 to +9 dB LED bar graph.
Selectable average or peak hold with reset. |
|
| Tape Counter: |
| 4-digit LED display with "return
to zero" and "Go to" functions. |
|
| Sequential Timers for
Controlling Copying Recorders: |
| Four fully isolated remote control
timer circuits to sequentially start up to four
recorders with an overlap of one minute between
consecutive tapes. |
|
| Transcription Capability: |
| Foot switch control of play, backspace,
and stop plus keyboard backspace key. |
|
| Performance Documentation: |
| Complete documentation of frequency
response, wow & flutter, 2nd and 3rd harmonic
distortion, signal-to-noise, cross talk, hold back and
take-up tension measurements are provided. |
|
| Size: |
| 16-1/2" x 12" x 5-3/4",
19" mountable with optional shelf or ears. |
|
| Warranty: |
| One year parts & labor.
(Shipping & insurance paid by customer). |
|
Call Toll Free 866 260 6376 For
More Details and Pricing
STANDARD CASSETTE PLAYBACK/TRANSCRIBER UNIT
Special Features:
The JBR standard cassette unit has a special playback head. This playback head
has two sections. One section has the same configuration as a standard 1/4-track
stereo playback head and is used to play cassette recordings that were made on
properly maintained, operated and aligned recorders. The other section has nine
narrow tracks distributed across the recording and is used to play cassettes
that were made on defective, dirty, and/or misaligned recorders. By selecting
tracks that improve intelligibility and signal quality and omitting tracks that
do not, a trained operator can usually produce a more intelligible playback than
can be obtained by playing this recording on a standard ½-track head. This head
is unique to the JBR Standard Cassette Playback Unit.
Specs:
| Playback Capability: |
| Plays all standard cassettes (1/4-track
stereo and 1/2-track monaural, C-10 through C-120). |
|
|
| Tape Format: |
| 1/4-track stereo standard cassette. |
|
| Number of Channels: |
| Eleven channels (Side A 9-tracks, plus
Side B, left & right ¼-track stereo channels
backwards). |
|
| Variable Speed: |
| Continuously variable from 2.00 cm/sec
to over 5.0 cm/sec.
| Three digit LED speed display to 1/100
cm/sec. |
|
|
| Number of Heads: |
| One custom 11-track play head
(9-separate, in-line 70 µm wide tracks play Side A,
2-tracks (std. 1/4-track configuration) play Side B
backwards). |
|
| Cross talk: |
| 45 dB (between left and right ¼-track
channels, 1 kHz @ -10 dB). |
|
| Speed Change BOT TO EOT: |
| Less than 0.1% (less than 3 Hz change
in the frequency of a 3 kHz tone from BOT to EOT @ 4.8
cm/sec). |
|
| Signal-to-Noise: |
| Better than 50 dBA (Referred to 250 nW/m)
at a bandwidth of 40 to 12 KHz. |
|
| Distortion: |
| Less than 2.5% (312 Hz @ 0 dB 2nd, 3rd
and 4th harmonics). |
|
| Audio Outputs: |
| Eleven fully isolated line outputs on
rear of unit - Switch selectable -10, 0, and +10 dB
gain. |
|
| Head Phone Output: |
| One headphone output on front of unit.
1/4" stereo phone jack with volume control. |
|
| Audio Level Bar graph: |
| Stereo bar graph. |
|
| Performance Documentation: |
| Complete documentation of frequency
response, wow & flutter, 2nd and 3rd harmonic
distortion, signal-to-noise, cross-talk, hold-back and
take-up tension measurements are provided. |
|
| Standard Special Features: |
| Tracks 8 and 9 play the Guard Band
where taller original erase head magnetic marks are
recorded.
|
|
| Size: |
| 19" X 15-3/4" X 7-1/2,"
19" mountable. |
|
| Warranty: |
| One year parts & labor. (Shipping
& insurance paid by customer). |
|
Call Toll Free 866 260 6376 For
More Details and Pricing
UNIVERSAL DVD & CD PLAYER/TRANSCRIBER UNIT
JBR's Universal DVD & CD Player/Transcriber is
specifically designed and optimized for playing and transcribing all CD's (MP3
and WMA encoded) and most DVD's. This Unit has features that will enhance the
efficiency and accuracy of the transcriber. If the track and time information is
entered in the transcript, a cross-reference is generated that enables the
reviewer to check the accuracy of any transcribed statement or conversely
determine if any statement heard is accurately transcribed.
| Dual headphone outputs with limiter.
| Foot pedal control of Play and Skip-back.
| Near perfect performance.
| | |
Specs:
PLAYBACK/TRANSCRIPTION CAPABILITY - CD's
| Plays both 3" and 5" diameter CD's.
| Plays CD-R's, CD-R/W's and CD-Audio. MP-3's
encoded at 32 kilobits-per-second (kbps) to 320 kbps.
| WMA (Windows Multi-media Audio) encoded at 48
kbps to 192 kbps. |
| |
PLAYBACK/TRANSCRIPTION CAPABILITY - DVD's
| Plays DVD-RAM and DVD-Audio. |
AUDIO OUTPUTS:
Limiter to Protect Listener's Hearing
The system has an electronic limiter with a limit
indicator (LED) that indicates limiting. Recordings may contain loud
noises (transients) that can over time damage a listener's hearing.
The limiter prevents sounds from exceeding a safe listening level
and lights an LED if the circuit is limiting the headphone level to
alert the listener to reduce the headphone volume. But reducing the
volume may prevent the listener from understanding quiet sounds. In
this case, the limiter enables the listener to increase the volume
which will cause the loud sounds to clip and increase the volume of
quiet sounds making them easier to hear. This can increase the
speech recovery of a recording that has very loud and extremely
quiet sounds.
Dual Headphone Outputs
The system has two stereo headphone outputs with
volume control.
| Analog Line Output |
|
Stereo Line Outputs
Two RCA Phono Jacks
Fixed level - 2 Vrms
(1 kHz, 0dB) |
| Digital Output |
|
S/PDIF Optical |
Audio Performance
| Frequency response: |
22 Hertz to 20,000 Hertz, plus or minus 1
dB |
| Signal-to-noise: |
Better than 110 dB |
| Dynamic Range: |
98 dB (Limited by CD format) |
| Distortion: |
Less than 0.003% |
| Wow & Flutter: |
Below measurable limits |
| Size: |
Mount in 19" rack or set on table |
| AC power: |
117 VAC, 60 Hertz |
| Transcription Control: |
Control of PLAY, STOP, and SKIP-BACK via a
Foot Switch |
Call Toll Free 866 260 6376 For More Details
and Pricing
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Our resident
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