Singing Alarms Could Save the Blind6 M/ Q" J. k7 q( M2 v: J& ^3 f$ \ P
If you cannot see, you may not be able to find your way out of a burning building-and that could be fatal. A company in Leeds could change all that__1__ directional sound alarms capable of guiding you to the exit.
8 b0 \* U! _; Y: `; fSound Alert, a company__2__ the University of Leeds, is installing the alarms in a residential home for__3__ people in Sommerset and a resource centre for the blind in Cumbria.__4__produce a wide range of frequencies that enable the brain to determine the __5__ is coming from.
1 L. A; n& @# m3 a4 Y, K& R; I4 kDeborah Withington of Sound Alert says that the alarms use most of the frequencies that can be __6__ by humans. "It is a burst of white noise__7__ people say sounds like static on the radio," he says. "Its life-saving potential is great"
! @' \0 X# ^; y" T8 `She conducted an experiment in which people were filmed by thermal-imaging cameras trying to find their way out of a large__8__ room. It__9__ them nearly our minutes to find the door__10__ a sound alarm, but only 15 seconds with one.
; X/ \3 v; q8 n5 ^5 A0 a5 ?Withington studies how the brain__11__ sounds at the university. She says that the __12__ of a wide band of frequencies can be pinpointed more easily than the source of a narrow band. Alarms__13__ on the same concept have already been installed on emergency vehicles.
) ]6 X" F u; q- E" y5 kThe alarms will also include rising or falling frequencies to indicate whether people should go up__14__ down stairs. They were__15__ with the aid of a large grant from British Nuclear Fuels.. ~; j8 E6 k h9 y- I
1. A) without B)with C)having D)selling4 Z( d; [1 F, E; p) I: L+ B* j
2. A) run by B)changed by C) decorated by D)criticized by
/ J: d2 y# T9 y, B3. A) slow B)deaf C)blind D)lame: O5 w$ J9 ~ W1 m1 j1 }4 v& v+ d
4. A) Alarms B) Alarm C) The alarm D) The alarms7 K' Q8 s+ r. w8 }! T
5. A) noise B) sound C) music D) bell, |& H+ p i4 w, t: T3 X% u$ Q
6. A) watched B) produced C) learnt D) heard* L G% x; L# E- M& n
7. A) where B) what C) that D) how
- w$ N0 E- } X4 F( v. n- M8. A) smoked B) smoke-filled C) filled with smoke D) smoke-filling
! T, G* B2 N Y- N1 i2 t3 h& z9 Y9. A) has taken B) takes C) took D) will take
9 n/ H/ n! r2 @# k. P10. A) on B) near C) without D) from8 `* j. O1 T/ K2 O5 q
11. A) processes B) produces C) possesses D) proceeds
6 J4 J1 E1 Z( ]/ ]2 q12. A) feature B) quality C)diagram D) source# i4 j4 N8 E$ Z) |- Z0 @0 y
13. A) basis on B) base on C) basing on D) based on
- ^6 e+ d6 m" J) d; f14. A) or B) and C) but D) otherwise
! v$ i; N0 b# Y1 C15. A) developed B) determined C) discovered D) delivered! b8 C* X# L, b( ?& s; A& a
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发表于 2012-8-15 23:30:26
