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Results for “TAPE RECORDING”

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At least 19 recordsLinked to original sources
PubMed1998

Effect of tape recording on perturbation measures.

Tape recorders have been shown to affect measures of voice perturbation. Few studies, however, have been conducted to quantitatively justify the use or exclusion of certain types of recorders in voice perturbation studies. This study used sinusoidal and triangular waves and synthesized vowels to compare perturbation measures extracted from directly digitized signals with those recorded and played back through various tape recorders, including 3 models of digital audio tape recorders, 2 models of analog audio cassette tape recorders, and 2 models of video tape recorders. Signal contamination for frequency perturbation values was found to be consistently minimal with digital recorders (percent jitter = 0.01%-0.02%), mildly increased with video recorders (0.05%-0.10%), moderately increased with a high-quality analog audio cassette tape recorder (0.15%), and most prominent with a low-quality analog audio cassette tape recorder (0.24%). Recorder effect on amplitude perturbation measures was lowest in digital recorders (percent shimmer = 0.09%-0.20%), mildly to moderately increased in video recorders and a high-quality analog audio cassette tape recorder (0.25%-0.45%), and most prominent in a low-quality analog audio cassette tape recorder (0.98%). The effect of cassette tape material, length of spooled tape, and duration of analysis were also tested and are discussed.

Humans↗
PubMed1975

Validating the content of pediatric outpatient medical records by means of tape-recording doctor-patient encounters.

Information in 51 tape-recorded physician-patient encounters was compared with information written in the patients' medical records. Diagnoses, chief complaints, scheduled appointments, non-drug therapy, and diagnostic studies were uniformly well-recorded. Medication names were well-recorded but dosages were not. Characteristics of care such as levels of function, probable cause of illness, reason for follow-up, and compliance were recorded poorly. Patients were more likely to known about and understand their diagnosis, and names, dosage, and intended function of their medications when this information was written in the record than when it was not. These findings indicate a relationship between the quality of medical records and the effectiveness of care.

Child↗
PubMed1992

Comparison between tape-recorded and amplitude-integrated EEG monitoring in sick newborn infants.

In 15 ill newborn infants a comparison between long-term multichannel and single-channel recordings of simultaneously tape-recorded (Medilog system) and amplitude-integrated EEG (Cerebral Function Monitor) was made. There was good agreement between the main type of background activity diagnosed with the tape-recorded and the amplitude-integrated EEG for all recordings. Two infants had repetitive subclinical and subtle seizure activity, lasting for several hours, which was detected by both techniques. Short, single seizures were diagnosed in the recordings of nine infants. When a single electrographic seizure appeared in an otherwise stable recording, it was identified by both the tape-recorded and the amplitude-integrated EEG. Very short (5-30 s) seizure patterns, which were diagnosed with the tape-recorded EEG, were not identified in the cerebral function monitor recordings. In the single-channel recordings of both the EEG and the cerebral function monitor there were, on some occasions, difficulties in distinguishing single seizures from interference due to external artefacts. In the multichannel recordings the diagnosis of seizure patterns was facilitated by comparison with the other channels. Both the Medilog EEG and the cerebral function monitor are feasible techniques for following cerebral electrical activity in sick neonates, although neither technique is specifically constructed for this purpose. For clinical use in the neonatal intensive care unit the advantage with the cerebral function monitor is the immediately available recording. The tape-recorded EEG offers possibilities of more channels and a higher reliability when diagnosing short subclinical seizures, however, only after offline analysis.

Electroencephalography↗
PubMed1977

Long-term ECG in ambulatory clinical practice. Analysis and 2-year follow-up of 100 patients studied with a portable ECG tape recorder.

A portable tape recorder for long-term ECG monitoring is described. Its light weight (500 g) and small size (138 X 115 X 39 mm) make its usage in routine clinical practice a practical proposition. The most important application has been in the differential diagnosis of Adams--Strokes syndrome. The results from the first 100 patients with a 2-yr follow-up are presented. The importance of GCG recording during the patients' relevant subjective symptoms is stressed. The mean duration of recording was 2.8 days. In the 28 patients with histories which fitted the symptoms of Adams--Stokes syndrome this diagnosis was confirmed by an arrhythmia recorded simultaneously with the symptoms. In 36 other patients with a similar history the diagnosis was excluded becase of a normal ECG during subjective symptoms. Of the 28 patients with Adams--Stokes sydrome, bradyarrhthmia was the causal factor in 20 patients and these had a pacemaker implanted, whereas the remaining 8 patients had a tachyarrhythmia, which wa treated with antiarrhythmic drugs. The 2-yrs follow-up revealed an improvement and a disappearance of the Adams--Stokes attack in all the patients with an implanted pacemaker. In several of the 36 patients in whom Adams--Stokes syndrome could not be confirmed the syncopal attacks disappeared spontaneously. A large number of arrhythmias, including ventricular and supraventricular tachycardia, 2nd degree AV block and sinus bradycardia were observed during symptom-free intervals in these 36 patients. The introduction of long-term ECG recording routinely in patients with dizziness and syncope of unknown reason has resulted in an increase of the number of patients with a confirmed diagnosis of the Adams--Stokes syndrome, and it has contributed to an increase in the incidence of pacemaker implantation in Malmö from 130 per million inhabitants in 1971 to 220 in 1973, and 1974, respectively.

Adams-Stokes Syndrome↗
PubMed1985

Recording electrophysiological data on video tape: a superior and less costly alternative to conventional tape recorders.

Electrical potentials recorded extracellularly from the sinus gland of the isopod, Oniscus asellus, were stored on video tape with the aid of a digital-audio (DA) processor and a video cassette recorder (VCR). The DA processor transforms the analog signal to digital pulses of equal amplitude and converts these pulses into a television signal for recording on video tape. In playback, the DA processor reconverts the pulses to an analog signal with negligible distortion. When viewed on the oscilloscope screen, electrical potentials reproduced by this method were indistinguishable from electrical potentials recorded 'live' from the sinus gland. However, electrical potentials recorded from the same sinus gland and reproduced by a conventional FM tape recorder were easily differentiated from the 'live' recording. The special effects inherent in the VCR (e.g. stop action, frame advance) also permitted detailed analysis of spontaneously occurring electrical potentials. Special effects were not possible with the FM tape recorder. The price, ease of operation and ability to produce extremely high quality recordings, makes the DA processor and VCR an exceptional system for storing electrophysiological data.

Animals↗
PubMed2000

Use of tape-recorded food records in assessing children's dietary intake.

BACKGROUND: Dietary assessment among children is particularly problematic when techniques are dependent on memory skills or advanced cognitive development. OBJECTIVE: The current study explored the use of self-report by tape recorders to document children's dietary intake immediately upon consumption, and compared this method with the traditional, interviewer-guided recall technique. In addition, the influence of body fatness and sociodemographic characteristics on the accuracy of recall and tape-recorded food records was determined. RESEARCH METHODS AND PROCEDURES: The sample included 30 black and white children aged 6.5 to 11.6 years (x = 9.5). Energy intake (EI), measured by six 24-hour food records (three for each method), was compared with total energy expenditure calculated by the doubly labeled water technique. Paired t tests, correlation analyses, and multiple regression analyses were performed. RESULTS: The analyses revealed poor validity of the tape recorder method (x misreporting score = -1.13+/-2.62 MJ/day, r for total energy expenditure and EI = -0.06, p = 0.74). Estimates of EI differed significantly between the tape recorder and recall methods (p<0.01). The traditional recall method was confirmed as a valid estimate of energy intake (x misreporting score = 0.04+/-2.38 MJ/day), although demonstrating a modest correlation with TEE (r = 0.32, p = 0.08). Although no significant predictors of misreporting using the recall method were identified in the multivariate analyses, older children and children with higher adiposity were more likely to misreport using the tape recorder method. DISCUSSION: The results suggest that the use of the tape recorder for estimating EI does not result in accurate assessments among children, although this technique may be useful for specific subgroups (i.e., younger and leaner children).

Black People↗