Singing Alarms Could Save the Blind
, O' U$ R3 s i& aIf 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.- g9 b" E7 j H# o3 b
Sound 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. y, D* J) S5 r" Q7 t# M
Deborah 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"
# {4 U: o% L+ ^% lShe 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.5 U: p T& H+ d0 I
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.4 R' Y$ a# S& ^8 |2 j6 M( G$ S
The 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.
, P0 K$ v) G- t1. A) without B)with C)having D)selling
' ~2 ]; g: R( d0 i3 ~2. A) run by B)changed by C) decorated by D)criticized by
1 I f3 @, d2 w7 H7 [+ Y3. A) slow B)deaf C)blind D)lame$ c3 S; R+ b& m0 G
4. A) Alarms B) Alarm C) The alarm D) The alarms
( I, L2 ]- l! p3 j. K5 f# q5. A) noise B) sound C) music D) bell
( ~. f( n6 O9 @. F# ^6. A) watched B) produced C) learnt D) heard
9 s7 a& O& W' J, r( ?5 r7 Z7. A) where B) what C) that D) how6 `' O7 F0 _' c3 F2 |) H
8. A) smoked B) smoke-filled C) filled with smoke D) smoke-filling
j7 y! d) l5 j1 p5 u9. A) has taken B) takes C) took D) will take
6 M: T6 w @0 G3 s; @10. A) on B) near C) without D) from& W7 U) P8 l4 W1 ?" v
11. A) processes B) produces C) possesses D) proceeds$ |2 d$ P2 J/ T3 i. c+ }$ p
12. A) feature B) quality C)diagram D) source
6 a, Z$ I& g! H& s- ~' c13. A) basis on B) base on C) basing on D) based on3 i) F* B. s8 P5 [! Q
14. A) or B) and C) but D) otherwise
% e) E+ ?# [3 \$ B& l# x15. A) developed B) determined C) discovered D) delivered
4 ^. q1 _# j/ f- \key: BACDB DCBCC ADDAA |
发表于 2012-8-15 23:30:26
