| 释义 |
mid-ˈrange
[range n.1]
1. Statistics. The arithmetic mean of the largest and the smallest values of a group, esp. a sample.
1949Ann. Math. Statistics XX. 257 The significance tests investigated..are based on the quantity [(sample midrange)-(hypothetical mean)]/(sample range). 1951Dixon & Massey Introd. Statistical Analysis xvi. 238 It is probably not advisable to use the midrange for samples of more than five observations since its efficiency drops below that of the median beyond this point. 1973M. H. Belz Statistical Methods for Process Industries ii. 22 There are four commonly employed measures of sample location, the sample mean, the sample median, the sample mode and the sample mid-range.
2. a. The middle part of the range of audible frequencies. Freq. attrib.
1955E. T. Canby Home Mus. Syst. (ed. 2) x. 160 The newest wrinkles in the speaker department are the tiny super tweeter, for crispness in extremely high tones, and the large mid-range tweeter, to take over the middle ‘intelligence’ highs. 1960C. Brown Introd. Hi-Fi iv. 89 A third speaker to handle the mid-range can be introduced if required. 1971Hi-Fi Sound Feb. 68/1 The radiogram has speaker units which are..surprisingly sensitive, particularly in the mid-range. 1975Gramophone Jan. 1425/1 The tweeter maintains the smooth and wide dispersion of energy as it takes over from the bass and mid-range unit.
b. A loudspeaker designed to reproduce mid-range signals with fidelity while being relatively unresponsive to those of low or high frequency.
1955E. T. Canby Home Mus. Syst. (ed. 2) x. 160 A cheap and effective alternative is an ordinary medium-sized cone speaker used as a mid-range. 1975Hi-Fi Answers Feb. 68/1 It was specifically developed as a good mid-range for the new Leak 2000 series of speakers. |