(n.) A cover, or partial cover, for the face, used for disguise or protection; as, a dancer's mask; a fencer's mask; a ball player's mask.
(n.) That which disguises; a pretext or subterfuge.
(n.) A festive entertainment of dancing or other diversions, where all wear masks; a masquerade; hence, a revel; a frolic; a delusive show.
(n.) A dramatic performance, formerly in vogue, in which the actors wore masks and represented mythical or allegorical characters.
(n.) A grotesque head or face, used to adorn keystones and other prominent parts, to spout water in fountains, and the like; -- called also mascaron.
(n.) In a permanent fortification, a redoubt which protects the caponiere.
(n.) A screen for a battery.
(n.) The lower lip of the larva of a dragon fly, modified so as to form a prehensile organ.
(v. t.) To cover, as the face, by way of concealment or defense against injury; to conceal with a mask or visor.
(v. t.) To disguise; to cover; to hide.
(v. t.) To conceal; also, to intervene in the line of.
(v. t.) To cover or keep in check; as, to mask a body of troops or a fortess by a superior force, while some hostile evolution is being carried out.
(v. i.) To take part as a masker in a masquerade.
(v. i.) To wear a mask; to be disguised in any way.
Example Sentences:
(1) The blocking action may have masked and hindered detection of the stimulatory action of barium in other systems.
(2) Masking experiments are demonstrated for electrical frequency-modulated tone bursts from 1,000 to 10,000 cps and from 10,000 to 1,000 cps with superimposed clicks.
(3) Though immunocytochemistry did not show staining of synaptic regions this may be due to masking of the reactive epitope.
(4) Such factors can mask any interactions between biologic factors of the aging female reproductive system and other social factors that might otherwise detemine fertility during the later reproductive years.
(5) The interresponse-time reinforcement contingencies inherent in these schedules may actually mask the effects of overall reinforcement rate; thus differences in response rate as a function of reinforcement rate when interresponse-time reinforcement is eliminated may be underestimated.
(6) In gastric cancers the major finding was the occurrence of extensive masking of lectin binding sites by sialic acid which was not seen in normal mucosa.
(7) The expression of such secondary and tertiary syphilis is commonly masked and distorted by the long-term effects of subcurative doses of antibiotics; in fact, late latent and tertiary syphilis produce symptoms and immunosuppression similar to the profile of AIDS.
(8) After induction of anesthesia, the airway of those in group A was maintained with a conventional tracheal tube; in group B, with a laryngeal mask airway.
(9) To determine if the type of mechanical ventilation used (ie, face mask, nasal prongs, or endotracheal tube) was associated with GPNN, a matched case-control analysis was performed.
(10) Data were analyzed by investigators who were masked to treatment assignment or phase of study.
(11) The air entrainment devices from oxygen masks of four manufacturers (Henleys Medical Supplies Ltd, Vickers Medical, Intersurgical Ltd, C R Bard International Ltd) were studied.
(12) North Korea's blustering defiance at the annual US-South Korean exercises masks just a little fear that they could easily be turned into an all-out attack, and seems to work on the principle that the more you shout, the safer you will be.
(13) Since headache can often represent the warning symptom of a masked depression, in the present study sulpiride has been administered to patients suffering from nonorganic headache syndromes.
(14) • Police would be given discretion to remove face masks from people on the street "under any circumstances where there is reasonable suspicion that they are related to criminal activity".
(15) Analyses of this artificial curve allow estimation of that part of the internal interactions uninfluenced by the masking effect.
(16) Compared to previous masking studies of orientation selective units, non-oriented units have somewhat broader spatial frequency sensitivity curves, in agreement with primate neurophysiology.
(17) The contralateral masked condition was performed using 30-dB-SL 400-Hz narrow-band masking noise centered at frequency of test tone.
(18) But the research drills down into the data to examine different cohorts separately, and discovers that reassuring overall averages are masking some striking variations.
(19) Older subjects were found to be significantly more susceptible to the backward masking effect over longer delays between the target and masking stimuli.
(20) We have compared an alternative breathing system for preoxygenation comprising a Hudson face mask with high oxygen inflow (48 litre min-1) and a Mapleson A breathing system (100 ml kg-1 min-1).
Masker
Definition:
(n.) One who wears a mask; one who appears in disguise at a masquerade.
(v. t.) To confuse; to stupefy.
Example Sentences:
(1) Finally, three mechanisms are discussed that contribute to the absence of unmasking by masker fluctuations in hearing-impaired listeners.
(2) Detectability of a filtered probe tone (250, 500, or 1000 Hz) was measured in the presence of a narrow-band Gaussian masker centered at the signal frequency.
(3) For fixed delta T (delta T greater than 3 msec), the masking effect may actually increase for the longer, less intense noises despite the fact that, for long maskers, there is less masker energy near the signal in time.
(4) Results indicated that the MLD decreased in magnitude as the interaural phase shift of the masker increased.
(5) Forward masking, as measured behaviorally, is defined as an increase in a signal's detection threshold resulting from a preceding masker.
(6) Thus the overshoot effect was markedly reduced by aspirin because the drug partially counteracted the normally poor detectability for signals presented soon after masker onset.
(7) Masker and signal frequencies were the same as for the first experiment.
(8) The iso-forward masking contour near the threshold of the masking effect across masker frequencies approximates a fiber's frequency threshold curve (FTC).
(9) In part, the small threshold shifts can be attributed to the reduction in response variance following the masker, which is the result of the adaptation of spontaneous activity.
(10) Hence, one cannot predict masked threshold from the acoustic spectra of the maskers used here since they differ from their internal representations.
(11) The data support a spectrum-analyzer model of detection in which multiband filtering of the input smooths the masker energy in each spectral region to approximate the Gaussian case.
(12) Recent investigations of the masking-level difference (MLD) have often involved measurement of the MLD as a function of masker level.
(13) The masker with the largest amplitude fluctuations exhibited greater forward-masking ability than other stimuli; this effect was observed on the high-frequency branch and within the tip region of the tuning curve.
(14) The 20-ms signal was presented at the onset or at the temporal center of the 400-ms masker.
(15) A reaction time paradigm was used to estimate the sensitivity of four subjects to airpuffs without and during continuous vibration (masker) of low (30 Hz) or high (240 Hz) frequency.
(16) The data from all three experiments suggest that threshold signal levels in the presence of interaural differences in masker intensity depend principally on the ear with the higher signal-to-masker ratio at the output of its auditory filter, a finding consistent with the power-spectrum model of masking.
(17) Because maskers that are decorrelated yield small MLDs, the MLD is likewise small at low masker levels.
(18) For large masker separations, r greater than 0.4, no consistent effects of signal phase were observed.
(19) The IMD is dominated by the cubic component (2f1-f2) and arises from the interaction of the probe tone and the simultaneous masker.
(20) Masker duration was 20 or 400 ms; in the latter case, the signal was presented in one of three temporal positions within the masker.