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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. 

 

MICRO-CASSETTE PLAYBACK/TRANSCRIBER UNIT

STANDARD CASSETTE PLAYBACK/TRANSCRIBER UNIT

UNIVERSAL DVD & CD PLAYER/TRANSCRIBER UNIT

 

New JBR Products

           

     

MICRO-CASSETTE PLAYBACK/TRANSCRIBER UNIT

Playback - The unit was specifically designed to "safely" and "accurately" play all known track stereo and -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 -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.
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 -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 -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 m wide tracks play Side A, 2-tracks (std. 1/4-track configuration) play Side B backwards).
Cross talk:
45 dB (between left and right -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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Call Us Toll Free At 866 260 6376  EnhancedAudio.com PO Box 189 Windsor, PA  17366  Sales@Enhancedaudio.com