我一直在努力让 Broadcom 4306/2 在旧的戴尔笔记本电脑 (Latitude D800) 上工作。
我的情况非常接近这个
那里提到的解决方案似乎是删除 b43legacy 并使用 b43 代替，尽管文档明确表示 b43legacy 是正确的。无论如何，没有一个对我有用。
尽管我运行的是 Debian Squeeze，但我还是使用了几个 Arch 页面作为指南。这是因为 Arch 作者通常在较低的水平上写作，这样你就可以更好地发现哪里出了问题。
对我来说，看起来硬件正在工作，软件正在与之对话。请参阅下面的 wpa_supplicant 输出。芯片检测到 AP 的正确 SSID，因此无线电正在工作。然而，它不能关联。
还显示了 b43legacy 的 lsmod 和 modinfo 的输出。如果知道如何阅读这些内容的人能提供帮助，我将不胜感激。我不知道如何继续前进。
安德鲁
[. . .]
Authentication with 00:26:b8:f3:f2:20 timed out.
Trying to associate with 00:26:b8:f3:f2:20 (SSID='TELUS5335' freq=2437 MHz)
Authentication with 00:26:b8:f3:f2:20 timed out.
Trying to associate with 00:26:b8:f3:f2:20 (SSID='TELUS5335' freq=2437 MHz)
Authentication with 00:26:b8:f3:f2:20 timed out.
Trying to associate with 00:26:b8:f3:f2:20 (SSID='TELUS5335' freq=2437 MHz)
Authentication with 00:26:b8:f3:f2:20 timed out.
Trying to associate with 00:26:b8:f3:f2:20 (SSID='TELUS5335' freq=2437 MHz)
Authentication with 00:26:b8:f3:f2:20 timed out.
Trying to associate with 00:26:b8:f3:f2:20 (SSID='TELUS5335' freq=2437 MHz)
Authentication with 00:26:b8:f3:f2:20 timed out.
Trying to associate with 00:26:b8:f3:f2:20 (SSID='TELUS5335' freq=2437 MHz)
Authentication with 00:26:b8:f3:f2:20 timed out.
Trying to associate with 00:26:b8:f3:f2:20 (SSID='TELUS5335' freq=2437 MHz)
Authentication with 00:26:b8:f3:f2:20 timed out.
Trying to associate with 00:26:b8:f3:f2:20 (SSID='TELUS5335' freq=2437 MHz)
Authentication with 00:26:b8:f3:f2:20 timed out.
Trying to associate with 00:26:b8:f3:f2:20 (SSID='TELUS5335' freq=2437 MHz)
Authentication with 00:26:b8:f3:f2:20 timed out.
Trying to associate with 00:26:b8:f3:f2:20 (SSID='TELUS5335' freq=2437 MHz)
Authentication with 00:26:b8:f3:f2:20 timed out.
Trying to associate with 00:26:b8:f3:f2:20 (SSID='TELUS5335' freq=2437 MHz)
Authentication with 00:26:b8:f3:f2:20 timed out.
Trying to associate with 00:26:b8:f3:f2:20 (SSID='TELUS5335' freq=2437 MHz)
Authentication with 00:26:b8:f3:f2:20 timed out.
Trying to associate with 00:26:b8:f3:f2:20 (SSID='TELUS5335' freq=2437 MHz)
Authentication with 00:26:b8:f3:f2:20 timed out.
Trying to associate with 00:26:b8:f3:f2:20 (SSID='TELUS5335' freq=2437 MHz)
Authentication with 00:26:b8:f3:f2:20 timed out.
Trying to associate with 00:26:b8:f3:f2:20 (SSID='TELUS5335' freq=2437 MHz)
Authentication with 00:26:b8:f3:f2:20 timed out.
Trying to associate with 00:26:b8:f3:f2:20 (SSID='TELUS5335' freq=2437 MHz)
Authentication with 00:26:b8:f3:f2:20 timed out.
^Z
[1]+ Stopped wpa_supplicant -iwlan0 -c<(wpa_passphrase "TELUS5335" "XXXXXXXXXX") -D wext
root@mothra:/var/run# kill %1
[1]+ Stopped wpa_supplicant -iwlan0 -c<(wpa_passphrase "TELUS5335" "XXXXXXXXXX") -D wext
root@mothra:/var/run# CTRL-EVENT-TERMINATING - signal 15 received
[1]+ Done wpa_supplicant -iwlan0 -c<(wpa_passphrase "TELUS5335" "XXXXXXXXXX") -D wext
root@mothra:/var/run# wpa_supplicant -iwlan0 -c<(wpa_passphrase "TELUS5335" "XXXXXXXXXX") -D nl80211 -dd
Initializing interface 'wlan0' conf '/dev/fd/63' driver 'nl80211' ctrl_interface 'N/A' bridge 'N/A'
Configuration file '/dev/fd/63' -> '/dev/fd/63'
Reading configuration file '/dev/fd/63'
Line: 1 - start of a new network block
ssid - hexdump_ascii(len=9):
54 45 4c 55 53 35 33 33 35 TELUS5335
PSK - hexdump(len=32): [REMOVED]
Priority group 0
id=0 ssid='TELUS5335'
Initializing interface (2) 'wlan0'
SIOCGIWRANGE: WE(compiled)=22 WE(source)=21 enc_capa=0xf
capabilities: key_mgmt 0xf enc 0xf
WEXT: Operstate: linkmode=1, operstate=5
Own MAC address: 00:90:4b:7a:14:73
wpa_driver_nl80211_set_wpa
wpa_driver_nl80211_set_key: alg=0 addr=0x80b7d38 key_idx=0 set_tx=0 seq_len=0 key_len=0
nl80211: set_key failed; err=-67
wpa_driver_nl80211_set_key: alg=0 addr=0x80b7d38 key_idx=1 set_tx=0 seq_len=0 key_len=0
nl80211: set_key failed; err=-67
wpa_driver_nl80211_set_key: alg=0 addr=0x80b7d38 key_idx=2 set_tx=0 seq_len=0 key_len=0
nl80211: set_key failed; err=-67
wpa_driver_nl80211_set_key: alg=0 addr=0x80b7d38 key_idx=3 set_tx=0 seq_len=0 key_len=0
nl80211: set_key failed; err=-67
wpa_driver_nl80211_set_countermeasures
wpa_driver_nl80211_set_drop_unencrypted
RSN: flushing PMKID list in the driver
Setting scan request: 0 sec 100000 usec
WPS: UUID based on MAC address - hexdump(len=16): 5e d6 9f e5 5b d1 58 ea a1 a5 df e1 30 fe 24 25
WPS: Build Beacon and Probe Response IEs
WPS: * Version
WPS: * Wi-Fi Protected Setup State (0)
WPS: * Version
WPS: * Wi-Fi Protected Setup State (0)
WPS: * Response Type (2)
WPS: * UUID-E
WPS: * Manufacturer
WPS: * Model Name
WPS: * Model Number
WPS: * Serial Number
WPS: * Primary Device Type
WPS: * Device Name
WPS: * Config Methods (0)
WPS: * RF Bands (3)
EAPOL: SUPP_PAE entering state DISCONNECTED
EAPOL: KEY_RX entering state NO_KEY_RECEIVE
EAPOL: SUPP_BE entering state INITIALIZE
EAP: EAP entering state DISABLED
Added interface wlan0
RTM_NEWLINK: operstate=0 ifi_flags=0x1002 ()
RTM_NEWLINK, IFLA_IFNAME: Interface 'wlan0' added
RTM_NEWLINK: operstate=0 ifi_flags=0x1003 ([UP])
RTM_NEWLINK, IFLA_IFNAME: Interface 'wlan0' added
State: DISCONNECTED -> SCANNING
Starting AP scan (broadcast SSID)
Trying to get current scan results first without requesting a new scan to speed up initial association
Received scan results (0 BSSes)
Cached scan results are empty - not posting
Selecting BSS from priority group 0
Try to find WPA-enabled AP
Try to find non-WPA AP
No suitable AP found.
Setting scan request: 0 sec 0 usec
Starting AP scan (broadcast SSID)
Scan requested (ret=0) - scan timeout 10 seconds
nl80211: Event message available
nl80211: New scan results available
Received scan results (1 BSSes)
New scan results available
WPS: attr type=0x104a len=1
WPS: attr type=0x1044 len=1
WPS: attr type=0x1049 len=6
WPS: Unsupported attribute type 0x1049 len=6
WPS: attr type=0x104a len=1
WPS: attr type=0x1044 len=1
WPS: attr type=0x1049 len=6
WPS: Unsupported attribute type 0x1049 len=6
Selecting BSS from priority group 0
Try to find WPA-enabled AP
0: 00:26:b8:f3:f2:20 ssid='TELUS5335' wpa_ie_len=28 rsn_ie_len=24 caps=0x411
selected based on RSN IE
selected WPA AP 00:26:b8:f3:f2:20 ssid='TELUS5335'
Trying to associate with 00:26:b8:f3:f2:20 (SSID='TELUS5335' freq=2437 MHz)
Cancelling scan request
WPA: clearing own WPA/RSN IE
Automatic auth_alg selection: 0x1
RSN: using IEEE 802.11i/D9.0
WPA: Selected cipher suites: group 8 pairwise 24 key_mgmt 2 proto 2
WPA: set AP WPA IE - hexdump(len=30): dd 1c 00 50 f2 01 01 00 00 50 f2 02 02 00 00 50 f2 04 00 50 f2 02 01 00 00 50 f2 02 0c 00
WPA: set AP RSN IE - hexdump(len=26): 30 18 01 00 00 0f ac 02 02 00 00 0f ac 04 00 0f ac 02 01 00 00 0f ac 02 0c 00
WPA: using GTK TKIP
WPA: using PTK CCMP
WPA: using KEY_MGMT WPA-PSK
WPA: Set own WPA IE default - hexdump(len=22): 30 14 01 00 00 0f ac 02 01 00 00 0f ac 04 01 00 00 0f ac 02 00 00
No keys have been configured - skip key clearing
wpa_driver_nl80211_set_drop_unencrypted
State: SCANNING -> ASSOCIATING
wpa_driver_nl80211_set_operstate: operstate 0->0 (DORMANT)
WEXT: Operstate: linkmode=-1, operstate=5
wpa_driver_nl80211_associate
Setting authentication timeout: 10 sec 0 usec
EAPOL: External notification - EAP success=0
EAPOL: External notification - EAP fail=0
EAPOL: External notification - portControl=Auto
RSN: Ignored PMKID candidate without preauth flag
RTM_NEWLINK: operstate=0 ifi_flags=0x1003 ([UP])
RTM_NEWLINK, IFLA_IFNAME: Interface 'wlan0' added
Wireless event: cmd=0x8b19 len=8
RTM_NEWLINK: operstate=0 ifi_flags=0x1003 ([UP])
RTM_NEWLINK, IFLA_IFNAME: Interface 'wlan0' added
Wireless event: cmd=0x8b04 len=12
EAPOL: disable timer tick
Authentication with 00:26:b8:f3:f2:20 timed out.
Added BSSID 00:26:b8:f3:f2:20 into blacklist
No keys have been configured - skip key clearing
State: ASSOCIATING -> DISCONNECTED
wpa_driver_nl80211_set_operstate: operstate 0->0 (DORMANT)
WEXT: Operstate: linkmode=-1, operstate=5
EAPOL: External notification - portEnabled=0
EAPOL: External notification - portValid=0
EAPOL: External notification - EAP success=0
Setting scan request: 0 sec 0 usec
State: DISCONNECTED -> SCANNING
Starting AP scan (broadcast SSID)
Scan requested (ret=0) - scan timeout 30 seconds
nl80211: Event message available
nl80211: New scan results available
Received scan results (0 BSSes)
New scan results available
Selecting BSS from priority group 0
Try to find WPA-enabled AP
Try to find non-WPA AP
No APs found - clear blacklist and try again
Removed BSSID 00:26:b8:f3:f2:20 from blacklist (clear)
Selecting BSS from priority group 0
Try to find WPA-enabled AP
Try to find non-WPA AP
No suitable AP found.
Setting scan request: 5 sec 0 usec
RTM_NEWLINK: operstate=0 ifi_flags=0x1003 ([UP])
RTM_NEWLINK, IFLA_IFNAME: Interface 'wlan0' added
Wireless event: cmd=0x8b19 len=8
Starting AP scan (broadcast SSID)
Scan requested (ret=0) - scan timeout 30 seconds
nl80211: Event message available
nl80211: New scan results available
Received scan results (0 BSSes)
New scan results available
Selecting BSS from priority group 0
Try to find WPA-enabled AP
Try to find non-WPA AP
No suitable AP found.
Setting scan request: 5 sec 0 usec
RTM_NEWLINK: operstate=0 ifi_flags=0x1003 ([UP])
RTM_NEWLINK, IFLA_IFNAME: Interface 'wlan0' added
Wireless event: cmd=0x8b19 len=8
Starting AP scan (broadcast SSID)
Scan requested (ret=0) - scan timeout 30 seconds
nl80211: Event message available
nl80211: New scan results available
Received scan results (1 BSSes)
New scan results available
WPS: attr type=0x104a len=1
WPS: attr type=0x1044 len=1
WPS: attr type=0x1049 len=6
WPS: Unsupported attribute type 0x1049 len=6
WPS: attr type=0x104a len=1
WPS: attr type=0x1044 len=1
WPS: attr type=0x1049 len=6
WPS: Unsupported attribute type 0x1049 len=6
Selecting BSS from priority group 0
Try to find WPA-enabled AP
0: 00:26:b8:f3:f2:20 ssid='TELUS5335' wpa_ie_len=28 rsn_ie_len=24 caps=0x411
selected based on RSN IE
selected WPA AP 00:26:b8:f3:f2:20 ssid='TELUS5335'
Trying to associate with 00:26:b8:f3:f2:20 (SSID='TELUS5335' freq=2437 MHz)
Cancelling scan request
WPA: clearing own WPA/RSN IE
Automatic auth_alg selection: 0x1
RSN: using IEEE 802.11i/D9.0
WPA: Selected cipher suites: group 8 pairwise 24 key_mgmt 2 proto 2
WPA: set AP WPA IE - hexdump(len=30): dd 1c 00 50 f2 01 01 00 00 50 f2 02 02 00 00 50 f2 04 00 50 f2 02 01 00 00 50 f2 02 0c 00
WPA: set AP RSN IE - hexdump(len=26): 30 18 01 00 00 0f ac 02 02 00 00 0f ac 04 00 0f ac 02 01 00 00 0f ac 02 0c 00
WPA: using GTK TKIP
WPA: using PTK CCMP
WPA: using KEY_MGMT WPA-PSK
WPA: Set own WPA IE default - hexdump(len=22): 30 14 01 00 00 0f ac 02 01 00 00 0f ac 04 01 00 00 0f ac 02 00 00
No keys have been configured - skip key clearing
wpa_driver_nl80211_set_drop_unencrypted
State: SCANNING -> ASSOCIATING
wpa_driver_nl80211_set_operstate: operstate 0->0 (DORMANT)
WEXT: Operstate: linkmode=-1, operstate=5
wpa_driver_nl80211_associate
Setting authentication timeout: 10 sec 0 usec
EAPOL: External notification - EAP success=0
EAPOL: External notification - EAP fail=0
EAPOL: External notification - portControl=Auto
RSN: Ignored PMKID candidate without preauth flag
RTM_NEWLINK: operstate=0 ifi_flags=0x1003 ([UP])
RTM_NEWLINK, IFLA_IFNAME: Interface 'wlan0' added
Wireless event: cmd=0x8b19 len=8
RTM_NEWLINK: operstate=0 ifi_flags=0x1003 ([UP])
RTM_NEWLINK, IFLA_IFNAME: Interface 'wlan0' added
Wireless event: cmd=0x8b04 len=12
Authentication with 00:26:b8:f3:f2:20 timed out.
Added BSSID 00:26:b8:f3:f2:20 into blacklist
No keys have been configured - skip key clearing
State: ASSOCIATING -> DISCONNECTED
wpa_driver_nl80211_set_operstate: operstate 0->0 (DORMANT)
WEXT: Operstate: linkmode=-1, operstate=5
EAPOL: External notification - portEnabled=0
EAPOL: External notification - portValid=0
EAPOL: External notification - EAP success=0
Setting scan request: 0 sec 0 usec
State: DISCONNECTED -> SCANNING
Starting AP scan (broadcast SSID)
Scan requested (ret=0) - scan timeout 30 seconds
nl80211: Event message available
nl80211: New scan results available
Received scan results (0 BSSes)
New scan results available
Selecting BSS from priority group 0
Try to find WPA-enabled AP
Try to find non-WPA AP
No APs found - clear blacklist and try again
Removed BSSID 00:26:b8:f3:f2:20 from blacklist (clear)
Selecting BSS from priority group 0
Try to find WPA-enabled AP
Try to find non-WPA AP
No suitable AP found.
Setting scan request: 5 sec 0 usec
RTM_NEWLINK: operstate=0 ifi_flags=0x1003 ([UP])
RTM_NEWLINK, IFLA_IFNAME: Interface 'wlan0' added
Wireless event: cmd=0x8b19 len=8
Starting AP scan (broadcast SSID)
Scan requested (ret=0) - scan timeout 30 seconds
nl80211: Event message available
nl80211: New scan results available
Received scan results (0 BSSes)
New scan results available
Selecting BSS from priority group 0
Try to find WPA-enabled AP
Try to find non-WPA AP
No suitable AP found.
Setting scan request: 5 sec 0 usec
RTM_NEWLINK: operstate=0 ifi_flags=0x1003 ([UP])
RTM_NEWLINK, IFLA_IFNAME: Interface 'wlan0' added
Wireless event: cmd=0x8b19 len=8
Starting AP scan (broadcast SSID)
Scan requested (ret=0) - scan timeout 30 seconds
nl80211: Event message available
nl80211: New scan results available
Received scan results (1 BSSes)
New scan results available
WPS: attr type=0x104a len=1
WPS: attr type=0x1044 len=1
WPS: attr type=0x1049 len=6
WPS: Unsupported attribute type 0x1049 len=6
WPS: attr type=0x104a len=1
WPS: attr type=0x1044 len=1
WPS: attr type=0x1049 len=6
WPS: Unsupported attribute type 0x1049 len=6
Selecting BSS from priority group 0
Try to find WPA-enabled AP
0: 00:26:b8:f3:f2:20 ssid='TELUS5335' wpa_ie_len=28 rsn_ie_len=24 caps=0x411
selected based on RSN IE
selected WPA AP 00:26:b8:f3:f2:20 ssid='TELUS5335'
Trying to associate with 00:26:b8:f3:f2:20 (SSID='TELUS5335' freq=2437 MHz)
Cancelling scan request
WPA: clearing own WPA/RSN IE
Automatic auth_alg selection: 0x1
RSN: using IEEE 802.11i/D9.0
WPA: Selected cipher suites: group 8 pairwise 24 key_mgmt 2 proto 2
WPA: set AP WPA IE - hexdump(len=30): dd 1c 00 50 f2 01 01 00 00 50 f2 02 02 00 00 50 f2 04 00 50 f2 02 01 00 00 50 f2 02 0c 00
WPA: set AP RSN IE - hexdump(len=26): 30 18 01 00 00 0f ac 02 02 00 00 0f ac 04 00 0f ac 02 01 00 00 0f ac 02 0c 00
WPA: using GTK TKIP
WPA: using PTK CCMP
WPA: using KEY_MGMT WPA-PSK
WPA: Set own WPA IE default - hexdump(len=22): 30 14 01 00 00 0f ac 02 01 00 00 0f ac 04 01 00 00 0f ac 02 00 00
No keys have been configured - skip key clearing
wpa_driver_nl80211_set_drop_unencrypted
State: SCANNING -> ASSOCIATING
wpa_driver_nl80211_set_operstate: operstate 0->0 (DORMANT)
WEXT: Operstate: linkmode=-1, operstate=5
wpa_driver_nl80211_associate
Setting authentication timeout: 10 sec 0 usec
EAPOL: External notification - EAP success=0
EAPOL: External notification - EAP fail=0
EAPOL: External notification - portControl=Auto
RSN: Ignored PMKID candidate without preauth flag
RTM_NEWLINK: operstate=0 ifi_flags=0x1003 ([UP])
RTM_NEWLINK, IFLA_IFNAME: Interface 'wlan0' added
Wireless event: cmd=0x8b19 len=8
RTM_NEWLINK: operstate=0 ifi_flags=0x1003 ([UP])
RTM_NEWLINK, IFLA_IFNAME: Interface 'wlan0' added
Wireless event: cmd=0x8b04 len=12
^Z
[1]+ Stopped wpa_supplicant -iwlan0 -c<(wpa_passphrase "TELUS5335" "XXXXXXXXXX") -D nl80211 -dd
这是 lsmod 和 modinfo：
Module Size Used by
nls_utf8 908 1
nls_cp437 4489 1
vfat 6562 1
fat 34824 1 vfat
usb_storage 31009 1
ppdev 4058 0
lp 5570 0
firewire_sbp2 9603 0
arc4 974 2
ecb 1405 2
b43legacy 91692 0
ch7006 13868 1
snd_intel8x0m 8100 0
snd_intel8x0 19595 1
snd_ac97_codec 79152 2 snd_intel8x0m,snd_intel8x0
nouveau 314668 2
mac80211 123126 1 b43legacy
ac97_bus 710 1 snd_ac97_codec
ttm 33242 1 nouveau
cfg80211 87209 2 b43legacy,mac80211
drm_kms_helper 18545 2 ch7006,nouveau
rfkill 10220 1 cfg80211
joydev 6739 0
snd_pcm 47226 3 snd_intel8x0m,snd_intel8x0,snd_ac97_codec
drm 112489 5 ch7006,nouveau,ttm,drm_kms_helper
i2c_algo_bit 3493 1 nouveau
yenta_socket 16403 2
rsrc_nonstatic 7057 1 yenta_socket
i2c_core 12763 5 ch7006,nouveau,drm_kms_helper,drm,i2c_algo_bit
snd_seq 35375 0
snd_seq_device 3673 1 snd_seq
snd_timer 12270 2 snd_pcm,snd_seq
video 14605 0
dcdbas 3872 0
led_class 1757 1 b43legacy
rng_core 2178 1 b43legacy
shpchp 21200 0
parport_pc 15799 1
pci_hotplug 18545 1 shpchp
parport 22554 3 ppdev,lp,parport_pc
output 1204 1 video
snd 34399 9 snd_intel8x0m,snd_intel8x0,snd_ac97_codec,snd_pcm,snd_seq,snd_seq_device,snd_timer
evdev 5609 13
pcspkr 1207 0
psmouse 44817 0
soundcore 3450 1 snd
ac 1636 0
battery 3782 0
button 3598 1 nouveau
processor 26283 1
snd_page_alloc 5001 3 snd_intel8x0m,snd_intel8x0,snd_pcm
serio_raw 2916 0
usbhid 27928 0
hid 51509 1 usbhid
ext4 256629 1
mbcache 3762 1 ext4
jbd2 56091 1 ext4
crc16 1027 1 ext4
sg 19917 0
sr_mod 10770 0
sd_mod 25969 4
crc_t10dif 1012 1 sd_mod
cdrom 26435 1 sr_mod
ata_generic 2247 0
ssb 33626 1 b43legacy
mmc_core 38421 1 ssb
ata_piix 17716 1
uhci_hcd 16013 0
thermal 9206 0
firewire_ohci 16705 0
pcmcia 16194 1 ssb
tg3 95797 0
libata 115713 2 ata_generic,ata_piix
ehci_hcd 28533 0
usbcore 99350 5 usb_storage,usbhid,uhci_hcd,ehci_hcd
thermal_sys 9378 3 video,processor,thermal
firewire_core 31155 2 firewire_sbp2,firewire_ohci
crc_itu_t 1035 1 firewire_core
pcmcia_core 20426 4 yenta_socket,rsrc_nonstatic,ssb,pcmcia
libphy 11618 1 tg3
scsi_mod 104949 6 usb_storage,firewire_sbp2,sg,sr_mod,sd_mod,libata
nls_base 4727 5 nls_utf8,nls_cp437,vfat,fat,usbcore
filename: /lib/modules/2.6.32-5-686/kernel/drivers/net/wireless/b43legacy/b43legacy.ko
firmware: FW10
license: GPL
author: Michael Buesch
author: Stefano Brivio
author: Martin Langer
description: Broadcom B43legacy wireless driver
alias: ssb:v4243id0812rev04*
alias: ssb:v4243id0812rev02*
depends: mac80211,ssb,led-class,cfg80211,rng-core
vermagic: 2.6.32-5-686 SMP mod_unload modversions 686
parm: pio:enable(1) / disable(0) PIO mode (int)
parm: bad_frames_preempt:enable(1) / disable(0) Bad Frames Preemption (int)
parm: fwpostfix:Postfix for the firmware files to load. (string)
答案1
我现在已经开始工作了。问题是天线增益非常低。通过将其远离附近的金属物体并将其侧向、倒置等方式握住，可以使其正常关联和工作。技术问题的非常物理的解决方案。我猜任何低于 -80 dB 的声音都值得怀疑。